Zuk Z1 CDMA and EVDO support - Zuk Z1 Q&A, Help & Troubleshooting

I bought Zuk Z1 International version. I am right now using CM12.1 Nighly. After a long search I pressed *#*#4636#*#* and done the CDMA network setup, now i am able to call by cdma. But data is a big trouble.
When I switched to CDMA network APN settings section is now not visible in Mobile networks option. Now no data access I am able to get.
My mobile network working 100% good in cdma right now even after several reboots my phone remembers the cdma mode properly and and gets signal quickly. But I dont know how to run EVDO DATA now. I am not able to find where i need to place the user ID and password for my data connection? Please guide in this regard.
After conversion into CDMA mode now APN section no more visible in mobile network settings, where should I put my EVDO access credentials?

Mine is working great now. Just used new nano fresh CDMA sim. Old one was damaged while cutting so data was not running
Full process
Just stay with original cm 12.1. Press *#*#4636#*#* go to phone info. Change band to 800 MHz. Select gsm CDMA prl option. You may need to repeat process several times to get CDMA signal.
Use fresh nano sim for reliance. Cutting simmay create trouble if it is damaged. Any ques contact me. magicdecoders at gmail dot com

pragyavan said:
Mine is working great now. Just used new nano fresh CDMA sim. Old one was damaged while cutting so data was not running
Full process
Just stay with original cm 12.1. Press *#*#4636#*#* go to phone info. Change band to 800 MHz. Select gsm CDMA prl option. You may need to repeat process several times to get CDMA signal.
Use fresh nano sim for reliance. Cutting simmay create trouble if it is damaged. Any ques contact me. magicdecoders at gmail dot com
Click to expand...
Click to collapse
Hello!
please help me!
I have zuk z1, how to set up the phone worked on the first SIM wcdma, and the second only cdma?
thanks!

I use zuk z1 in India but not sported CDMA sim

CDMA working upto this version of the software
cm-12.1-YOG4PAS3OH-ham-signed
do not update by ota after this version.
use the process which i told

Last version is IG version in cm12.1. OH is second last version. They disabled cdma function in IG version before launching in India. so need to go back to OH version for cdma working.
CM13 not supporting cdma for this device

If you run CDMA sim in one slot, you can get work only gsm 2g network in other slot.....
so wcdma with cdma cannot be done my dear

Right now I'm successfully running Zuk z1 with tata docomo CDMA Karnataka. With both voice and evdo data.

see the ss.

see all the details

software download link
for nighly build
http://www.mediafire.com/download/tbiw5mgzfw8w617/cm-12.1-20151129-NIGHTLY-ham.zip
for gapps
http://www.mediafire.com/download/f6i1hkp80k8ody3/open_gapps-arm-5.1-pico-20160817.zip
install by custom recovery unlocked bootloader

Bsnl CDMA working in zuk z1 ??
any one please comments ur CDMA data connection speed ?.

Hi, ZUK Z1 uses snap 801 and on my last LG G3 I was able to use evdo RevB, so, can ZUK use evdo revB?

Zuk z1 cdma2000
What is the probability that the ZUK Z1 global version will work in CDMA2000?

Related

[Q] 4 G LTE and 3G not working on Yureka

hi,
i bought a yureka, everything is great. its just that i'm unable to use 3G or LTE on my device.
it always shows edge. on my device. and runs 2G
in mobile networks preferred network type is LTE. and i have LTE service in my area.
on phone info *#*#4636#*#* By default the preferred network comes as LTE/GSM auto(PRL) and network type shows EDGE.
i have tried changing the preferred network to WCDMA preferred, then radio on/off, still network type shows as EDGE.
i have unlocked the boot loader and then flashed the modem (NONHLOS.bin) from Rohan A joshi thread in XDA yu yureka.
still im unable to use 3G or LTE.
the SIM is perfectly fine, if i put the SIM in some other phone like iphone, everything works fine.
can someone please help me i will be thankful.
Try WCDMA Only
---------- Post added at 01:38 PM ---------- Previous post was at 01:38 PM ----------
Or disabling one sim which isn't meant for internet
I am also having the same problem only edge,and phone info shows as "gsm only " no matter what I do its not changing to wcdma or any other options help
Sent from my AO5510 using Tapatalk
N'ayam Amarsh'e said:
Try WCDMA Only
---------- Post added at 01:38 PM ---------- Previous post was at 01:38 PM ----------
Or disabling one sim which isn't meant for internet
Click to expand...
Click to collapse
tried , but didnt work.
tommy2601 said:
I am also having the same problem only edge,and phone info shows as "gsm only " no matter what I do its not changing to wcdma or any other options help
Sent from my AO5510 using Tapatalk
Click to expand...
Click to collapse
incase you find the fix, please let me know also...
In my phone I also do the same process on phone info *#*#4636#*#* By default the preferred network comes as LTE/GSM auto(PRL) and network type shows EDGE.
i have tried changing the preferred network to WCDMA preferred, then radio on/off, still network type shows as EDGE.
still im unable to use 3G or LTE.
the SIM is perfectly fine, if i put the SIM in some other phone like iphone, everything works fine.
How to fix this problem?
pijus_cool said:
In my phone I also do the same process on phone info *#*#4636#*#* By default the preferred network comes as LTE/GSM auto(PRL) and network type shows EDGE.
i have tried changing the preferred network to WCDMA preferred, then radio on/off, still network type shows as EDGE.
still im unable to use 3G or LTE.
the SIM is perfectly fine, if i put the SIM in some other phone like iphone, everything works fine.
How to fix this problem?
Click to expand...
Click to collapse
no idea, im also still waiting for any reply
Partial solution found.... On LTE sim slot i. e. Sim no. 1 using *#4636#*#* and then select wcdma will change the network to 3g.
But 2nd sim the wcdma option not activate.
Same problem for me too
I'm also facing the same problem. Selecting WCDMA only option is not working. It always comes back to GSM only mode. End result no 3G and hence no internet. Only whatsapp is working. Should I ask for replacement. 10 days is not over for me yet..
Finally 3G actually work on YUREKA
Finally after lots of hit and trials I got solution.
Two things you need to do.
First
a.select default type as WCDMA only
b. enter *#*#4636#*#* from keypad.
c. Go to Phone Information and turn off radio.
d. Now select WCDMA only and click on turn on radio
Second
Delete ur APN settings and set the setting manually as per
your service provider. search setting on google.
Finally MY YUREKA WORKING ACTUALLY ON 3G NETWORK
Note : Preferably do all settings on SIM 1 inserted in LTE slot
WCDMA only
I did that. Fortunately this time I'm able to select WCDMA only. Device started working in 3G. Now when I go home, again 3G is gone.
Did that selecting WCDMA only again. 3G is back.
Every time I need to do this like selecting data connectivity/Wifi. I'm getting sick of this. Unfortunately 10 days period is also over
Finally 3G working..
Hey Guys,
If anyone here still facing problem with the 3G connection.
Deactivate your Mobile Data Connection.
Try going to APN setting remove the Proxy Value and Port Value then Save it.
Finally, activate your Connection.
Its working for me.
This is not a bug
check on forum
that problem of APN
how to set a default network?
soodrohit said:
hi,
i bought a yureka, everything is great. its just that i'm unable to use 3G or LTE on my device.
it always shows edge. on my device. and runs 2G
in mobile networks preferred network type is LTE. and i have LTE service in my area.
on phone info *#*#4636#*#* By default the preferred network comes as LTE/GSM auto(PRL) and network type shows EDGE.
i have tried changing the preferred network to WCDMA preferred, then radio on/off, still network type shows as EDGE.
i have unlocked the boot loader and then flashed the modem (NONHLOS.bin) from Rohan A joshi thread in XDA yu yureka.
still im unable to use 3G or LTE.
the SIM is perfectly fine, if i put the SIM in some other phone like iphone, everything works fine.
can someone please help me i will be thankful.
Click to expand...
Click to collapse
hello,
i dialed in *#*#4636#*#* and got that menu the first time i turned off radio and selected wcdma only and turned on radio then rebooted.
i dont know why but it says no network available.
so i changed it back to lte/gsm after switching off radio and then switched it back on. i got the network back still on 2g.
but now everytime i reboot it goes back to wcdma only and no network available..
how do i make lte/gsm the default network so that i dont have to keep switching networks when my phone boots up
soodrohit said:
hi,
i bought a yureka, everything is great. its just that i'm unable to use 3G or LTE on my device.
it always shows edge. on my device. and runs 2G
in mobile networks preferred network type is LTE. and i have LTE service in my area.
on phone info *#*#4636#*#* By default the preferred network comes as LTE/GSM auto(PRL) and network type shows EDGE.
i have tried changing the preferred network to WCDMA preferred, then radio on/off, still network type shows as EDGE.
i have unlocked the boot loader and then flashed the modem (NONHLOS.bin) from Rohan A joshi thread in XDA yu yureka.
still im unable to use 3G or LTE.
the SIM is perfectly fine, if i put the SIM in some other phone like iphone, everything works fine.
can someone please help me i will be thankful.
Click to expand...
Click to collapse
I have had this problem too in a while. But I guess it go resolved somehow.
First there is SIM 1 which is only good enough to run 3G or LTE networks.
I tried a lot to run it.
Sometimes switching on and off the airplane mode gave me the 3G connection.
Not sure about LTE, the national capital still doesn't support LTE.:good:
Give it a try!
Guys first of all you need to know that only SIM 1 supports 4G LTE.
and both sim slots supports 3G but you need to get activate 3G Services on your number.
i am using 3G of Aircel and its working fine for me(Sim2).
pijus_cool said:
Partial solution found.... On LTE sim slot i. e. Sim no. 1 using *#4636#*#* and then select wcdma will change the network to 3g.
But 2nd sim the wcdma option not activate.
Click to expand...
Click to collapse
I just changed to WCDMA only and 3g started working.
My issue was 3G will work for a day then changes to 2G. Then I have to remove the sim and change slot for 3G to work. Will wait and see how long this will remain 3G.
Good 2 know
anuragk098 said:
Guys first of all you need to know that only SIM 1 supports 4G LTE.
and both sim slots supports 3G but you need to get activate 3G Services on your number.
i am using 3G of Aircel and its working fine for me(Sim2).
Click to expand...
Click to collapse
Hey Anurag, Can you please post the APN details of Aircel that you have on the Yureka? I have tried that *#*#46 etc and changing SIM from SIM1 slot to SIM2 slot. No difference. Still on EDGE.
Thanks,
Kiran.
Setting as mine:
Name: Aircel
APN: aircelgprs
MCC: 405
MNC: 810
APN type: default,supl
APN protocol: IPv4
APN roaming protocol: IPv4
if still not working go to your nearest aircel service station..
powerrangerkiran said:
Hey Anurag, Can you please post the APN details of Aircel that you have on the Yureka? I have tried that *#*#46 etc and changing SIM from SIM1 slot to SIM2 slot. No difference. Still on EDGE.
Thanks,
Kiran.
Click to expand...
Click to collapse
anuragk098 said:
Setting as mine:
Name: Aircel
APN: aircelgprs
MCC: 405
MNC: 810
APN type: default,supl
APN protocol: IPv4
APN roaming protocol: IPv4
if still not working go to your nearest aircel service station..
Click to expand...
Click to collapse
Thanks Anurag. There was some issue that even though it was same setting that I had, I still could not get 3G. Anyway, I upgraded to Lollipop and the problem has been resolved. Now I can get it to work on 3G Speed itself. Same APN "aircelgprs".

OnePlus Two - HSPA+ and 3G Data Connection Problem

Hi Everyone,
I'm usually just a reader on XDA, but I have found a problem that appears not to have been solved and wondered if anyone had any insight.
Problem Summary
When in an area (or network) with only HSPA and UMTS (strong HSPA/UMTS signal, but with no LTE or 2G available), the phone will drop from H+ to 3G erratically, always dropping the data connection. Traditional phone calls are not affected.
Detailed Description
I have a OnePlus Two and have 2 SIM cards. My first SIM Card is with Bell Canada (Virgin), and the second SIM Card is with WIND Mobile Canada.
Neither Bell nor WIND operate a 2G network, so the lowest the service can fall to is UMTS/3G.
Initially, I didn't notice the problem because Bell also operates an LTE network, and there is no problem with dropping the data connections when on LTE.
When I switched to the WIND SIM card (which only operates HSPA and UMTS), I noticed a problem where the phone would initially connect to H+, begin downloading whatever is needed (say, streaming music), but then part way through the download, the connection would switch to 3G, and the data would effectively stop. Within a minute, the service would jump back to H+ and download some more, but this cycle would continue (H+ --> 3G --> H+ --> 3G... ), with no way of knowing 1) how long the H+ connection would last before dropping to 3G (usually less than 30 seconds), and 2) after dropping to 3G, how long before going back to H+. This problem makes the phone almost useless when there is no LTE.
The most obvious troubleshooting I did was move to locations of better signal but I quickly ruled that out, as nothing seems to remove this problem. Other things I tried was to: move locations in the city, reboot phone, hard reset phone, flash most updated version of Oxygen, unlock bootloader, root, try the HSPA Keepalive app, swap SIM1 to SIM2, and many other things.
I originally thought this was a network issue, but I put this WIND SIM in another phone and there was no problem in any way that resembled this problem.
I also ruled out this being a network-specific problem, as I have taken a trip with the Bell SIM to an area where Bell does not have any LTE coverage (only HSPA and UMTS) and the same problem occurs on Bell as with the WIND SIM.
I have found people who had this problem on the OnePlus One tend to recommend using 2G to stabilize the connection, but this is not possible on Bell or WIND. That solution also would not provide adequate data speeds.
Remember this problem only affects data connectivity, as 3G traditional phone calls have no problems.
Question
Does anyone know if there is a way to adjust the conditions when the OnePlus Two will choose to switch from H+ to 3G?
Does anyone have any easier suggestions?
Thank you all in advance, because this rendering this phone almost useless when there is no LTE coverage.
I believe your problem is that phone it's dualsim standby, that means only one modem that alternates signal for both sims, I think normal would be alternating from faster network to slower network on sim without data.
Having to change to g3 between sims theres something stoped in the modem and data connection is also stopped.
You have no problem with voice calls because other sim is automatically turned off and unreachable.
There's nothing you can do if you're forced to only 3g on both sims
By 3g I mean 3g or h+ which to my knowledge are the same
Hope I was helpful and not wrong or more confusing
Sent from my ONE A2005 using Tapatalk
fburgos said:
I believe your problem is that phone it's dualsim standby, that means only one modem that alternates signal for both sims, I think normal would be alternating from faster network to slower network on sim without data.
Having to change to g3 between sims theres something stoped in the modem and data connection is also stopped.
You have no problem with voice calls because other sim is automatically turned off and unreachable.
There's nothing you can do if you're forced to only 3g on both sims
By 3g I mean 3g or h+ which to my knowledge are the same
Hope I was helpful and not wrong or more confusing
Sent from my ONE A2005 using Tapatalk
Click to expand...
Click to collapse
Thanks, I will try disabling the second SIM to see if there is a bug with the dual-sim...
What it currently does with the second SIM is it either shows "R" for roaming or just emergency only, but perhaps there is a software issue so I'll see if disabling the second SIM makes a difference.
biomedeng said:
Thanks, I will try disabling the second SIM to see if there is a bug with the dual-sim...
What it currently does with the second SIM is it either shows "R" for roaming or just emergency only, but perhaps there is a software issue so I'll see if disabling the second SIM makes a difference.
Click to expand...
Click to collapse
Though strange, this workaround fixes the issue. Thank you to fburgos for the suggestion!
So just in case anyone ever finds this issue creeps up on them, the solution is to DISABLE the SIM you are not using. It's not the most convenient workaround to swap SIMs, but the other SIM will be in Emergency Mode, so it really makes no functional difference.
On the technical side, it does appear that there is actually a bug in Android for a very uncommon network configuration. It will only appear in this exact configuration:
SIM1: Network has HSPA/3G only, no LTE or 2G to move to
SIM2: Network also only has HSPA/3G with no LTE or 2G
The non-data SIM does NOT connect to a roaming network (connects with "Emergency Only") - if it connects to a roaming 2G network, this problem does not happen.
The data SIM connects to HSPA/3G
Both SIMs are active
I'm not sure if this will happen anywhere else in the world other than having a WIND Mobile Canada SIM and Bell or TELUS Canada SIM
If anyone has insight on how to report this to Google, or someone else who can confirm my theory, that would be great!
Try this:
1. You need to make sure you have the correct LTE APN selected in mobile networks and LTE as preferred type.
2. Go to dialer and type in this: *#*#4636#*#*
3. Phone Information
4. Set Preferred Network Type to: LTE/GSM (PRL) - you an play with which one you wanna use but the one I said works for sure. on other roms I have" TD-SCDMA, GSM/WCDMA and LTE"
5. Now click TURN OFF RADIO and wait WAIT few secs. will that button turns to Turn Radio ON
6. Now TURN ON RADIO and wait
7. when u see the triangle for the signal is back, at least black , go down and lick SMSC REFRESH then UPDATE.
8. now just go back to APN settings and go into your LTE APN
9. Change Bearer to LTE
biomedeng said:
Hi Everyone,
I'm usually just a reader on XDA, but I have found a problem that appears not to have been solved and wondered if anyone had any insight.
Problem Summary
When in an area (or network) with only HSPA and UMTS (strong HSPA/UMTS signal, but with no LTE or 2G available), the phone will drop from H+ to 3G erratically, always dropping the data connection. Traditional phone calls are not affected.
Detailed Description
I have a OnePlus Two and have 2 SIM cards. My first SIM Card is with Bell Canada (Virgin), and the second SIM Card is with WIND Mobile Canada.
Neither Bell nor WIND operate a 2G network, so the lowest the service can fall to is UMTS/3G.
Initially, I didn't notice the problem because Bell also operates an LTE network, and there is no problem with dropping the data connections when on LTE.
When I switched to the WIND SIM card (which only operates HSPA and UMTS), I noticed a problem where the phone would initially connect to H+, begin downloading whatever is needed (say, streaming music), but then part way through the download, the connection would switch to 3G, and the data would effectively stop. Within a minute, the service would jump back to H+ and download some more, but this cycle would continue (H+ --> 3G --> H+ --> 3G... ), with no way of knowing 1) how long the H+ connection would last before dropping to 3G (usually less than 30 seconds), and 2) after dropping to 3G, how long before going back to H+. This problem makes the phone almost useless when there is no LTE.
The most obvious troubleshooting I did was move to locations of better signal but I quickly ruled that out, as nothing seems to remove this problem. Other things I tried was to: move locations in the city, reboot phone, hard reset phone, flash most updated version of Oxygen, unlock bootloader, root, try the HSPA Keepalive app, swap SIM1 to SIM2, and many other things.
I originally thought this was a network issue, but I put this WIND SIM in another phone and there was no problem in any way that resembled this problem.
I also ruled out this being a network-specific problem, as I have taken a trip with the Bell SIM to an area where Bell does not have any LTE coverage (only HSPA and UMTS) and the same problem occurs on Bell as with the WIND SIM.
I have found people who had this problem on the OnePlus One tend to recommend using 2G to stabilize the connection, but this is not possible on Bell or WIND. That solution also would not provide adequate data speeds.
Remember this problem only affects data connectivity, as 3G traditional phone calls have no problems.
Question
Does anyone know if there is a way to adjust the conditions when the OnePlus Two will choose to switch from H+ to 3G?
Does anyone have any easier suggestions?
Thank you all in advance, because this rendering this phone almost useless when there is no LTE coverage.
Click to expand...
Click to collapse
I have the same problem. Do you already have solved it?
I use only one SIM card so it is not a problem two cards.
really you do not have this problem? if no one knows the solution?
compared with my htc butterfly 2 and another low-end android, one plus 2 running latest Oxygen OS has serious connectivity issues. I compared the signals strength using same sim card in same location (including being connected to the same tower) and One Plus 2 keeps dropping the connection and has really poor signal strength. I have tried the *#*#4636#*#* and tried different network modes, but none of them are helping. Its a real disappointment that the basic feature of this phone is screwed up.
I have tried with CM13 as well. Any ideas if this is a modem version issue?
odeccacccp said:
Try this:
1. You need to make sure you have the correct LTE APN selected in mobile networks and LTE as preferred type.
2. Go to dialer and type in this: *#*#4636#*#*
3. Phone Information
4. Set Preferred Network Type to: LTE/GSM (PRL) - you an play with which one you wanna use but the one I said works for sure. on other roms I have" TD-SCDMA, GSM/WCDMA and LTE"
5. Now click TURN OFF RADIO and wait WAIT few secs. will that button turns to Turn Radio ON
6. Now TURN ON RADIO and wait
7. when u see the triangle for the signal is back, at least black , go down and lick SMSC REFRESH then UPDATE.
8. now just go back to APN settings and go into your LTE APN
9. Change Bearer to LTE
Click to expand...
Click to collapse
Did It.. But it seems like it didn't solve my problem..

UMI Super 3G instead of 4G

Hi,
did anyone using Umi Super have any problems with using 4G at 800MHz? Im on giffgaff and even though Umi Super is supposed to work at 4G under 800MHz (thats what the specification states) i cant manage to make it work. I have perfect 4G coverage, 4G sim, 4G tariff, even gave my sim to a friend with S7 edge and it worked on his phone. Maybe new update will fix that? I tried with different sim from different operator (LYCA) and it works but 4G in LYCA is at 2100MHz so I didnt really check the 800. I tried everything and still nothing. Did anyone have similar problem?
I actually bought 2 phones of the same model so I decided to check if 4G worked on the other one and as I put the sim card in I just remembered something and realized same thing happened with my phone. When I put the SIM card in for the first time it DID automatically go to 4G, ok, when I looked for available networks it found O2 4G, granted BUT!!! when i got to "preferred network type" there is only 3G to pick, and THE MOMENT I PICK IT there is not possible to go back. Every network I find from that moment is only 2G or 3G. Now i reckon that a software problem right? See attachments
It is a software bug and I think I sort it out after flashing the phone. For now I sorted out the problem using Networks app by Philipp Mangalov and switching network to LTE/GSM auto
Well it seems the data part of the UMI SUPER is not so super, is it? I face a similar problem but worse. The 4G band of 800 doesn't work(despite being advertized by UMI as supported) but luckily the band of 2100 works without any issues. The problem comes when I'm out of 2100 band coverage and phone must switch to 3G - then I lose all data connectivity completely. So basically whenever I'm out of 4G 2100 coverage(which is often) I am without any connectivity! Anyone facing the same? Solution?
Indopilot said:
Well it seems the data part of the UMI SUPER is not so super, is it? I face a similar problem but worse. The 4G band of 800 doesn't work(despite being advertized by UMI as supported) but luckily the band of 2100 works without any issues. The problem comes when I'm out of 2100 band coverage and phone must switch to 3G - then I lose all data connectivity completely. So basically whenever I'm out of 4G 2100 coverage(which is often) I am without any connectivity! Anyone facing the same? Solution?
Click to expand...
Click to collapse
I only have 3G and the phone shows that I have internet, but when I try to actually use the data it just says no connection on apps.
zbysogi said:
Hi,
did anyone using Umi Super have any problems with using 4G at 800MHz? Im on giffgaff and even though Umi Super is supposed to work at 4G under 800MHz (thats what the specification states) i cant manage to make it work. I have perfect 4G coverage, 4G sim, 4G tariff, even gave my sim to a friend with S7 edge and it worked on his phone. Maybe new update will fix that? I tried with different sim from different operator (LYCA) and it works but 4G in LYCA is at 2100MHz so I didnt really check the 800. I tried everything and still nothing. Did anyone have similar problem?
Click to expand...
Click to collapse
I don't have this issue at all. My UMi Super connects perfectly to my 4g network under 800MHz without an issue here in Uganda. You can install the MTK Engineering app from the play store and check the band compatibility on ur device and you can also set the mode using the same app under android settings.
You could also try updating to the latest OTA which is 20160810 or the one before it by downloading the files from forum post here and saving them to ur phone and updating manually if you don't have the current OTA
sachak said:
I don't have this issue at all. My UMi Super connects perfectly to my 4g network under 800MHz without an issue here in Uganda. You can install the MTK Engineering app from the play store and check the band compatibility on ur device and you can also set the mode using the same app under android settings.
You could also try updating to the latest OTA which is 20160810 or the one before it by downloading the files from forum post here and saving them to ur phone and updating manually if you don't have the current OTA
Click to expand...
Click to collapse
GravityBox is a perfect solution for this problem. You can set up an icon in notification bar allowing You to toggle between 2G/3G/4G
zbysogi said:
I actually bought 2 phones of the same model so I decided to check if 4G worked on the other one and as I put the sim card in I just remembered something and realized same thing happened with my phone. When I put the SIM card in for the first time it DID automatically go to 4G, ok, when I looked for available networks it found O2 4G, granted BUT!!! when i got to "preferred network type" there is only 3G to pick, and THE MOMENT I PICK IT there is not possible to go back. Every network I find from that moment is only 2G or 3G. Now i reckon that a software problem right? See attachments
Click to expand...
Click to collapse
same problem
This is indeed a software issue, one I have come accross many times - using an app to toggle between the service types is the best workaround!
There are many apps that work to resolve this, some great ones have already been mentioned.
TerryWebbs said:
This is indeed a software issue, one I have come accross many times - using an app to toggle between the service types is the best workaround!
There are many apps that work to resolve this, some great ones have already been mentioned.
Click to expand...
Click to collapse
Could you tell me some app that resolve this?
Thanks
I've got a UMI Super and had this issue as well:
try this app:
Network by Philipp Mangelow
https://play.google.com/store/apps/details?id=de.mangelow.network
4g Umi Super on Giff Gaff
You need Giff Gaff settings in access point name. If you try and use O2 4g it doesn't work even though Giff Gaff uses O2 network. Settings are really easy to input but MUST be Giff Gaff not O2.
zbysogi said:
I actually bought 2 phones of the same model so I decided to check if 4G worked on the other one and as I put the sim card in I just remembered something and realized same thing happened with my phone. When I put the SIM card in for the first time it DID automatically go to 4G, ok, when I looked for available networks it found O2 4G, granted BUT!!! when i got to "preferred network type" there is only 3G to pick, and THE MOMENT I PICK IT there is not possible to go back. Every network I find from that moment is only 2G or 3G. Now i reckon that a software problem right? See attachments
Click to expand...
Click to collapse
There is a fix on rooted phones by using GravityBox and switching between 2G/3G/4G
Thread can be closed.
4G on a Umi Super on GiffGaff.
zbysogi said:
There is a fix on rooted phones by using GravityBox and switching between 2G/3G/4G
Thread can be closed.
Click to expand...
Click to collapse
All that's needed is GiffGaff settings inputing manually. Very easy to do. O2 settings that the phone recognises when a GiffGaff sim is used WILL NOT WORK. The Network is O2 but the APN settings for GiffGaff are totally different.
All you guys that think you know what you're doing obviously don't.
No need to Root or use GravityBox or any other App.
Maz Jones said:
All that's needed is GiffGaff settings inputing manually. Very easy to do. O2 settings that the phone recognises when a GiffGaff sim is used WILL NOT WORK. The Network is O2 but the APN settings for GiffGaff are totally different.
All you guys that think you know what you're doing obviously don't.
No need to Root or use GravityBox or any other App.
Click to expand...
Click to collapse
Well said. I just shake my head in despair when I see how totally clueless people try to be teachers and Internet gurus with very limited knowledge about the task at hand. These comments should come with warning stickers.
For those who want to be able to switch between 3G/4G and LTE only, use this nifty little APK that I've attached below. It will allow you to enter engineer mode without using the dial code.
Hi
This is a bug implemented in Android 7.0.
I had the same.
1 Just force in your parameters 2G/3G networks
2 wait for network authentification (no more excalamtion mark)
3 go back to 4G
Every thing will be OK to next switch off or plane mode.
Rgds,
LTE band 7 (2600) not working
I recently received my new Umi Super and updated to the last firmware V7.01_20170413, everything works fine except for the 4G. I live in an area where band 7 (2600) is available but the phone can't connect to it. Of course, my preferred network type is set to 4G/3G/2G (auto).
I read a lot about the issue on the internet but I can't find a solution.
I checked the BandMode on the phone by dialing *#*#3646633#*#*, band 7 is included and checked. However, when I tried to remove the other LTE bands and keep only band 7, I got a message explaining that the list can't be empty ("Failed. The band is changed from not null to null, it is illegal"), though the list was not completely empty because band 7 was still selected.
Also, I tried to change the radio band by dialing *#*#4636#*#*, but process com.android.phone stopped working when I pressed "select radio band", even after I cleared cache in phone and sim apps.
Can anyone tell me how to fix the problem and get connected to 4G.
BTW, Network by Philipp Mangelow is not available anymore. Switching between 3G/2G and 4G/3G/2G settings doesn't fix the issue. I tried the giffgaff settings, but the APN gets deleted as soon as I try to save it.
Thanks
bemo00 said:
I recently received my new Umi Super and updated to the last firmware V7.01_20170413, everything works fine except for the 4G. I live in an area where band 7 (2600) is available but the phone can't connect to it. Of course, my preferred network type is set to 4G/3G/2G (auto).
I read a lot about the issue on the internet but I can't find a solution.
I checked the BandMode on the phone by dialing *#*#3646633#*#*, band 7 is included and checked. However, when I tried to remove the other LTE bands and keep only band 7, I got a message explaining that the list can't be empty ("Failed. The band is changed from not null to null, it is illegal"), though the list was not completely empty because band 7 was still selected.
Also, I tried to change the radio band by dialing *#*#4636#*#*, but process com.android.phone stopped working when I pressed "select radio band", even after I cleared cache in phone and sim apps.
Can anyone tell me how to fix the problem and get connected to 4G.
BTW, Network by Philipp Mangelow is not available anymore. Switching between 3G/2G and 4G/3G/2G settings doesn't fix the issue. I tried the giffgaff settings, but the APN gets deleted as soon as I try to save it.
Thanks
Click to expand...
Click to collapse
You may try to force 3G and then try to force 4G
You may try to user another IMEI number from a UMI device with 2600 support (of course backup/write down the original one before just in case)
http://www.ucc.co.ug/data/imei/2
After the update to Nougat 7.x how long does it take to do a full recharge?
Do you still have fast charge feature (< 1 hour) or do you lost it like all users reported so far?
What about your GPS? Do you have a fast fix after cleaning history and is it reliable (not losing signal often?).
SimurghXDA said:
You may try to force 3G and then try to force 4G
You may try to user another IMEI number from a UMI device with 2600 support (of course backup/write down the original one before just in case)
http://www.ucc.co.ug/data/imei/2
After the update to Nougat 7.x how long does it take to do a full recharge?
Do you still have fast charge feature (< 1 hour) or do you lost it like all users reported so far?
What about your GPS? Do you have a fast fix after cleaning history and is it reliable (not losing signal often?).
Click to expand...
Click to collapse
Is it safe to change the IMEI number? and where can I find another number for a UMI device?
GPS is working fine, it fixes pretty fast, but I'm not sure about interruption in the signal because I haven't used it enough yet

No 3g or 2g after *#*#4636#*#* Radio Band selected

Hi guys...
Could really use some help here...
I was facing some issues with my 4g network... So I went to the *#*#4636#*#* menu and turned off radio etc...
I usually did this when my 4g network would give me problems.
However last time I had some time in my hand and decided to see what other options are there. SO I went to the Radio Band option and I don't remember what I chose but ever since then my phone can detect only 4g on either sim. No 3g no 2g.
I went to the radio band menu again and have tried selecting all options but nothing seems to work... I get USA band and then BAND MODE 31,32, 33 all the way up to 42...
Please help me...
I am new to posting in the forum. So I can't figure out how to attach images.
[email protected] said:
Hi guys...
Could really use some help here...
I was facing some issues with my 4g network... So I went to the *#*#4636#*#* menu and turned off radio etc...
I usually did this when my 4g network would give me problems.
However last time I had some time in my hand and decided to see what other options are there. SO I went to the Radio Band option and I don't remember what I chose but ever since then my phone can detect only 4g on either sim. No 3g no 2g.
I went to the radio band menu again and have tried selecting all options but nothing seems to work... I get USA band and then BAND MODE 31,32, 33 all the way up to 42...
Please help me...
Click to expand...
Click to collapse
i had this problem i was also playing with the radio bands in the service menu follow these steps and surely you will get 2g coverage.
1. make sim 1 and as primary and then open service menu by *#*#4636#*#*.
and then select radio bands from top right corner and select radio band 42
2. now switch the sim cards in the sim slot and repeat the whole process from step 1 surely you will signals on both sim.
[email protected] said:
Hi guys...
Could really use some help here...
I was facing some issues with my 4g network... So I went to the *#*#4636#*#* menu and turned off radio etc...
I usually did this when my 4g network would give me problems.
However last time I had some time in my hand and decided to see what other options are there. SO I went to the Radio Band option and I don't remember what I chose but ever since then my phone can detect only 4g on either sim. No 3g no 2g.
I went to the radio band menu again and have tried selecting all options but nothing seems to work... I get USA band and then BAND MODE 31,32, 33 all the way up to 42...
Please help me...
Click to expand...
Click to collapse
just do factory reset and flash full oxygen rom and setings will reset
SOLVED!!!!
abukwr92 said:
i had this problem i was also playing with the radio bands in the service menu follow these steps and surely you will get 2g coverage.
1. make sim 1 and as primary and then open service menu by *#*#4636#*#*.
and then select radio bands from top right corner and select radio band 42
2. now switch the sim cards in the sim slot and repeat the whole process from step 1 surely you will signals on both sim.
Click to expand...
Click to collapse
You sir are a genius... May you live long and prosper...
Something related
Ok.... now I have network on both sims, 4g as well as 3g and 2g... however now my data connection only works on SIM2... when i use the same SIM on SIM1, theres just an exclamation mark beside LTE (or H or E) and no internet... But when i use SIM slot 2 with the same SIM, voila !!! I have data...
Whats the issue...
I went from oxygenOS to cm13 and I having issues after couple mins I fall back HSPA+

Problem with 4G signal @ Dutch vodafone 800, 1800, 2600 MHz

Hello,
I have the following problem: I can't get a 4G signal with my provider.
Vodafone Netherlands uses 800, 1800, 2600 MHz for 4G connection.
I have bought my telephone at flosmall . com
It should work, or do I forget something?
Can somebody explain this?
I had the same.
I tried some 4g signals apps to check my connection. This one seemed to fix it: https://play.google.com/store/apps/details?id=com.mcstealthapps3.networksignalsearch
Let me know if it worked for you!
I have trieded with the app but nothing changed.
But still on 3G...
I need to ask this.
Is your SIM card even 4G capable? If its older than 3-4 years it might not be.
I don't know anything about vodafone, but try googling, for one of my providers I actually needed to activate 4G on their website after logging in to my account.
Also. Settings -> Dual SIM & mobile networks. Is network mode set to 4G priority and Celluar data to correct SIM card if you are using dual setup.
Yes the sim card is capable with 4G (was using it on Lumia 950XL).
Have contacted Vodafone about the problem.
But the will only support devices that Vodafone Netherlands will be sell.
Have tried to flash lineage rom, but nothing change about the signal.
(stock Rom was from groschopp)
I also have a Le Pro 3 (x720) on the same network in the Netherlands and I have no issues with 4g.
I am currently using the Grossoshop-Rom (Build-number WAXCNFN5902011181S).
You can download several signal apps in the play-store to see if Band 20 is available to you, this is the one used in my region for 4g Vodafone.
I assume you set the preferred network type to 4G?
It's working now
Have called Vodafone again for some extra information about the frequency band for 4G.
But nobody could help me, there was one person that say i can give you a other simcard type maybe it will help. (I say how will it help if 4G works on a other phone with the same sim card, but let's just test it)
Afterwards the call, visited the shop for a other sim card
Doing the sim in slot 1 nothing changed, same 3G signal.
Was thinking this the last try and do the sim card in slot 2 and after 10 minutes i have LTE signal.
Trying slot 1 again but only 3G. changed back to slot 2 and solved.
Have earlier check slot 2 with me "older" sim card and only 3G was showing up.
I have noticed stock ROMs have better signals than say CM
88Gamer88 said:
It's working now
Have called Vodafone again for some extra information about the frequency band for 4G.
But nobody could help me, there was one person that say i can give you a other simcard type maybe it will help. (I say how will it help if 4G works on a other phone with the same sim card, but let's just test it)
Afterwards the call, visited the shop for a other sim card
Doing the sim in slot 1 nothing changed, same 3G signal.
Was thinking this the last try and do the sim card in slot 2 and after 10 minutes i have LTE signal.
Trying slot 1 again but only 3G. changed back to slot 2 and solved.
Have earlier check slot 2 with me "older" sim card and only 3G was showing up.
Click to expand...
Click to collapse
Same think, only H+ with Dutch Vodafone, put my SIM in slot 2 (hot swap) and immediately it turned on 4G :good:
(stock ROM 23s)
i have same issue in spain with x720 on simyo: no work 4g, only h+
i put on sim2 and nothing change
flammjager said:
i have same issue in spain with x720 on simyo: no work 4g, only h+
i put on sim2 and nothing change
Click to expand...
Click to collapse
You need to enter the APN settings for your provider's data coverage in the Mobile data section of Settings.
sk8223 said:
You need to enter the APN settings for your provider's data coverage in the Mobile data section of Settings.
Click to expand...
Click to collapse
apn is on and correctly
flammjager said:
apn is on and correctly
Click to expand...
Click to collapse
Are you on a custom ROM? Maybe it did something to the modem. If so, you need to return to a stock ROM and try.
The phone has all the bands it needs to work on your carrier, and my carrier as well. My SIM already had the APN settings for my carrier on it, and I connected to LTE right away on my x722. I'm on a vendor ROM, which is pretty much just stock eUI. I can't fathom why it doesn't work for you if you're still on stock. Have you tried the SIM in other phones?
I also have this problem in Romania with my LeECO Le Pro3, but with Orange 800,1800 and 2600Mhz. The only solution for this problem was to manualy search and select the 4G operator network. Although in settings/network operator it was on 4G/3G/2G(Auto) by default, my phone was stuck in H+/H/3G until i manualy search and select 4G. If you are sure your SIM is 4G and you have the corect APN you can try this but you will have to search and select for several times manualy to work. I find this solution very uncomfortable because every time you restart your phone or put it in airplain mode, you will have to repeat manual searches and register in 4G.
my x720 doesn't have the correct bands active. i activated them with qpst but only actived and running in sim2 (sim 1 actived but no gain lte signal)
ah! i'm on 20s
88Gamer88 said:
Hello,
I have the following problem: I can't get a 4G signal with my provider.
Vodafone Netherlands uses 800, 1800, 2600 MHz for 4G connection.
I have bought my telephone at flosmall . com
It should work, or do I forget something?
Can somebody explain this?
Click to expand...
Click to collapse
Do you own the X722?
Hello, I have problem with 4G, with Android 8.1
When I back Android 8.1 I have 4G Signal.
---------- Post added at 09:09 PM ---------- Previous post was at 08:57 PM ----------
Hi, after I install All Android custom 8.1
I try install android 7.1 (AICP 12.1) I have LTE Signal
When I back Android 8.1 and select Only LTE, I don't have any signal (4g,3g etcc) I have chage to "Global" and I have H+ signal

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