Roaming - often border crossing with voLTE issues - Samsung Galaxy S8+ Guides, News, & Discussion

If any of you cross your borders often and thus change carriers from your official carrier to the other country's carrier's network and have issues switching back to your carrier once back in your country switch voLTE off.
I have encountered this issues when traveling between Switzerland and France - my "swiss carrier" and the french ones as i cross the border daily. I was going crazy not understanding why when i was back in my country the phone would stick on 1 bar of the roamed country, and that i had to change it manually (and this waiting some 4-5 minutes for it to register on my official carrier's network). Then i switch the voLTE to off, and tadam! perfect switch when i cross the border.
voLTE, to my experience would rather give you one really bad 4G / LTE signal, rather than switching you to a good 3g / 2g network
This is just in case some people have the same issue.

Take a look at this thread in the S8 forum. Reply #5.
https://forum.xda-developers.com/tmobile-galaxy-s8/help/off-volte-t3599708

Related

[Q] Bugs (build 3.0.A.2.184)

Since I did not found any official bug topic for this handset, I will
start one.
Here are some finding with build 3.0.A.2.184
1. Roaming detection fails
Handset indicates that it's roaming when connected to home
network (FI Saunalahti)
2. PIN code input UI layout not corrent on landscape mode
Start handset with gamepad open and wait until PIN code input to launch.
Anybody else having these issues?
.181
I'm on .181 and i don't have any of those problems.
My correction key is at the input line and havn't been asked about roaming since i got the phone.
It could be that with roaming it just means using data. You have an option somewhere for no roaming, national roaming or international roaming.
svenk919 said:
It could be that with roaming it just means using data. You have an option somewhere for no roaming, national roaming or international roaming.
Click to expand...
Click to collapse
It's on
But, what he describes, it's "roaming" even when he it's connected to carrier network. Mine doesn't do that.
I have full signal, so maybe it's because of poor signal?
Im on build 3.0.A.2.181 and don't have any problems with the phone.
The only gripe i have is with my network provider.
I come from England and used to be with Orange on my old phone, i always had full signal where i work and a data connection.
On my Xperia Play i went with Vodafone and quite frequently lose signal, and rarely get a data connection at work.
Outside of work it is fine, but at work it is meh.
As far as the build software goes though, i havn't had any bad issues i've noticed at all. Not one.
the signal is definately worse on my xperia play than on my x10, i kind of have the death grip like the iphone 4 had.
Got to agree with the signal woes here.
I swear my old Hero would've found a signal in the middle of the frackin' amazon.
My play drops signal when I sneeze.
Maybe my poor signal is with my handset and not my network provider then. Hmmmmmmmzzzz.............

[Q] SM900F Baseband Question/Problems

Hello ,
I bought a SM900F from UK a while ago and it was unlocked. I was capable of using 4G network there easily with no problems, but recently I have come to Dubai and am not able to hop on the 4G network . I have checked all the settings and made sure I had the 4G sim/ 4G data bundle and so on , but still same problem.
As per Wiki : Etisalat United Arab Emirates 1800 3 FDD September 2011 [500]
Etisalat United Arab Emirates 2600 7 FDD September 2011 [520]
My operator provides 4G on 1800 and 2600 Frequencies which are supported by SM900F. Just to clarify , this unit had never been locked .
So now im sitting here confused on what I need to do to get my 4G working , Im always connected to H and H+ .
Thanks in Advance ,
Nylem
Try to ask operator to give you his APN settings!
Settings - more networks - mobile networks - ap
Thanks for the reply ,
I have done that but still no hope
Nylem said:
what I need to do to get my 4G working , Im always connected to H and H+ .
Click to expand...
Click to collapse
Your phone should support those LTE bands.
Confirm that the band /frequency information isn't outdated.
Are you in an area where the carrier doesn't have LTE coverage?
Open a support ticket to investigate if the carrier has provisioned your account /SIM correctly for LTE.
Look at the various online forums and find out if others are getting LTE in your location.
Set what the LTE signal strength is in the S5 service menu.
Set a preference for LTE in the service menu.
Possibly you are getting 4G, bit the onscreen icon is just incorrect?
Try updating or changing your 900F modem.
.
fffft said:
Your phone should support those LTE bands.
Confirm that the band /frequency information isn't outdated.
Are you in an area where the carrier doesn't have LTE coverage?
Open a support ticket to investigate if the carrier has provisioned your account /SIM correctly for LTE.
Look at the various online forums and find out if others are getting LTE in your location.
Set what the LTE signal strength is in the S5 service menu.
Set a preference for LTE in the service menu.
Possibly you are getting 4G, bit the onscreen icon is just incorrect?
Try updating or changing your 900F modem.
.
Click to expand...
Click to collapse
Thanks for the swift response mate ,
1) Band/Frequency are all compatible with the phone
2) The whole city is LTE covered ( specially mine that I live in the center ) .
3) Already working on a ticket with the carrier , but they say problem is from my side
1) I set the LTE Signal , Lost all connection
2) I put bearer as LTE , Lost all connection
3) Could be a possibility
Can you kindly forward me or show me the path to where I can change my 900F modem to a more international one , Thanks a bunch !
<3
Nylem said:
Could be a possibility
Click to expand...
Click to collapse
Something is probably misconfigured or misprovisioned. But regardless, the issue will only be solved by paying attention to details and a process of elimination (of the possible causes).
The most productive single thing that you could do at this point would be to borrow a known working LTE SIM from a neighbour and see if works in your handset. Whatever the result, it would narrow down the possible culprits.
Also, don't assume that the frequencies are correct. Confirm with the carrier that they haven't changed or added new LTE bands.
Make the effort to find out what forums your carriers' customers usually frequent and look at recent posts there for seredipitious insights that you won't find elsewhere.
Don't dismiss the icon idea out of hand. Are your speeds indicative of an LTE connection?
You don't need a more "international" modem. Just a more current 900F one. Or less commonly, an alternate or older modem if your current one has a bug. Do a forum search for threads about changing modems. There are a lot of them. Don't fixate on this - it's one of the least likely possibilities.
Also consider updating to Android 4.4.3 or 4.4.4 which is said to address some connectivity bugs.
.

VoLTE on T-Mobile USA

One of my friends came from overseas a few months ago with VoLTE working on Tmobile US. At least I thought it was.
I did not think much of it at the time, but now that I have my own Z5, and can't get it to work, I'm curious.
Is there any special APN settings needed for VoLTE on TmoUS?
WHen i received my Z5, I noticed there was not any option for VoLTE. I went ahead and flashed the a singapore rom and it is here now but still cannot get it to work. I will try different settings and update.
I am also going to go through a few more roms to see if they work out of the box with it.
WIll it not ever work unlesss TmoUS certifies this device specifically? I don't think that is the case.
It's carrrier dependant
VoLTE uses the SIP protocol for communication. Aside of the implementation of the handling of such calls you would need the necessary data for registering at the server including the server's address, username and password.
I bought my international version from Amazon and turns out it is a Taiwanese version.
I can turn volte on or off but I can't tell it is working or not cause I don't know how to test it.
Testing it is pretty straightforward. Make sure you're on a 4G (LTE) network and place a phone call. Watch to see if you're signal changes to something other than where it started.
My experience is that I have 4G (LTE) in fewer places than 3G, as 4G seems to be less awesome at penetrating thick buildings. So, I don't see what the advantage/concern of VoLTE working or not is. But, I'm happy to learn.
Yakkosmurf said:
Testing it is pretty straightforward. Make sure you're on a 4G (LTE) network and place a phone call. Watch to see if you're signal changes to something other than where it started.
My experience is that I have 4G (LTE) in fewer places than 3G, as 4G seems to be less awesome at penetrating thick buildings. So, I don't see what the advantage/concern of VoLTE working or not is. But, I'm happy to learn.
Click to expand...
Click to collapse
When I make a call, the icon switch from 4G into 3G and H+ (back and forth between the two).
Does it mean no VoLte?
misbehave said:
When I make a call, the icon switch from 4G into 3G and H+ (back and forth between the two).
Does it mean no VoLte?
Click to expand...
Click to collapse
I have the same question too.
That's my understanding of the problem. With my AT&T iPhone, it stays reading LTE when I place calls.
If you see switching from LTE to another network upon dialing or receiving a call and going back to LTE once hung up it's a very strong indication that VoLTE does not work.
andiling said:
If you see switching from LTE to another network upon dialing or receiving a call and going back to LTE once hung up it's a very strong indication that VoLTE does not work.
Click to expand...
Click to collapse
THat is correct. My phone switches from 4G to H+ when on a phone call...
After many hours with t-mobile, and also at work, i was informed that t-mobiles VoLTE is proprietary and only tmoUS branded devices are usually the ones to get VoLTE to work with them.
Maybe in the future that will change, they said. oh well.
Until now every provider's solution is proprietary as the 3gpp standard is not finalized yet. So we need to be patient...

Network signal for Mobile internet shows 'H'. Changes to 'G' while making calls.

Hii,
I looked around and couldn't find any similar thread.
My network provider is Aircel in Chennai, India. MotoG4 Plus. Android 6.0.1
Most of the time my phone displays 'H' next to the network signal bar. Mobile internet works perfectly fine. As soon I make a call, the 'H' changes to 'G' and voice quality is pretty bad. Isn't it suppose to be 3G (H) for the calls too? Sometimes an '!' mark also appears at the end of the mobile signal. Not sure how to fix this. Voice quality is bad.
Any help?
Networks in India, aside from the major ones (Airtel, BSNL, Vodafone etc), usually have deals with the major ones for the 3g spectrum. Which means, the 3g bandwidth you are using in your telecom circle is of an another network's... However, the 2g spectrum is still your operator's spectrum & not a different one. Therefore, if you call, the operator forcefully switches your network from 3g to 2g. If you want calling in 3g, use a network that has bought the spectrum in your circle (usually Airtel, BSNL & Vodafone).
A similar thing exists with "VoLTE". LTE in India right now (with the exception of Jio) falls back onto 3g/2g for calling, while using 4g fr data. Whereas, VoLTE uses LTE for calling too.
The exclamation mark indicates that the phone can't connect to Google servers to verify whether your Internet is active.
aditya.upadhyaya said:
Networks in India, aside from the major ones (Airtel, BSNL, Vodafone etc), usually have deals with the major ones for the 3g spectrum. Which means, the 3g bandwidth you are using in your telecom circle is of an another network's... However, the 2g spectrum is still your operator's spectrum & not a different one. Therefore, if you call, the operator forcefully switches your network from 3g to 2g. If you want calling in 3g, use a network that has bought the spectrum in your circle (usually Airtel, BSNL & Vodafone).
A similar thing exists with "VoLTE". LTE in India right now (with the exception of Jio) falls back onto 3g/2g for calling, while using 4g fr data. Whereas, VoLTE uses LTE for calling too.
The exclamation mark indicates that the phone can't connect to Google servers to verify whether your Internet is active.
Click to expand...
Click to collapse
Thanks a lot Aditya for your reply. :good::good::good:

Signal problem theory/research

Hello, i live in a relatively small town where my service provider has very poor 4G signal. but pretty good 3G signal. With the Axon 7 i have a lot of signal problems that i didnt have with any of my previous phones, where outdoor signal is pretty bad and indoor signal is almost unusable. It also connects almost exclusively to 4G, and in contrast all of my previous phones connected almost exclusively to 3G. Over the last weekend i traveled to a major city where my service provider has very strong 4G signal, and the signal problem was almost non existant. I even had signal in places where other people with the same service provider did not. So my theory is the following, assuming that the hardware (antenna) used for 4G and 3G is the same, it may not be a hardware problem, but a problem with the software having a hard time knowing which band/signal it should connect to. It seems that in my case it prioritizes 4G signal and the cost of a VERY unstable cellphone service. This is also assosiated with the fact that when it connects to 3G (incredibly rare), the phone goes inmediately from 1/2 bars to 4/5 bars. I also changed the SIM configuration to leave LTE out, but either for a visual bug or a software bug, it keeps connecting only to 4G. So could this be the problem that me and a lot of people in low 4G signal zones are having? Is there anyway i can force the phone to connect exclusivly to the 3G signal to test if that is indeed the problem?
Regards!
Nehuen said:
Hello, i live in a relatively small town where my service provider has very poor 4G signal. but pretty good 3G signal. With the Axon 7 i have a lot of signal problems that i didnt have with any of my previous phones, where outdoor signal is pretty bad and indoor signal is almost unusable. It also connects almost exclusively to 4G, and in contrast all of my previous phones connected almost exclusively to 3G. Over the last weekend i traveled to a major city where my service provider has very strong 4G signal, and the signal problem was almost non existant. I even had signal in places where other people with the same service provider did not. So my theory is the following, assuming that the hardware (antenna) used for 4G and 3G is the same, it may not be a hardware problem, but a problem with the software having a hard time knowing which band/signal it should connect to. It seems that in my case it prioritizes 4G signal and the cost of a VERY unstable cellphone service. This is also assosiated with the fact that when it connects to 3G (incredibly rare), the phone goes inmediately from 1/2 bars to 4/5 bars. I also changed the SIM configuration to leave LTE out, but either for a visual bug or a software bug, it keeps connecting only to 4G. So could this be the problem that me and a lot of people in low 4G signal zones are having? Is there anyway i can force the phone to connect exclusivly to the 3G signal to test if that is indeed the problem?
Regards!
Click to expand...
Click to collapse
Without knowing which model Axon 7 you are using, where you are using it, and who your provider is, there is little anyone can do to help you. All I can say is that it helped me A LOT to go into settings and turn off
VoLTE.
tabletalker7 said:
Without knowing which model Axon 7 you are using, where you are using it, and who your provider is, there is little anyone can do to help you. All I can say is that it helped me A LOT to go into settings and turn off
VoLTE.
Click to expand...
Click to collapse
U model last update, using it from Argentina, and the provider is Claro. I have LTE disabled in SIM confg as i already said and VoLTE turn of as well but the phone keeps connecting to 4G no matter what i do, even if i configure it to only GSM
I don't think its a matter of position or provider (version could be if different software is provided), but a general issue with the phone and band/signal interpretation coupled with the apparent innability to go off 4G
Refards!
Nehuen said:
U model last update, using it from Argentina, and the provider is Claro. I have LTE disabled in SIM confg as i already said and VoLTE turn of as well but the phone keeps connecting to 4G no matter what i do, even if i configure it to only GSM
I don't think its a matter of position or provider (version could be if different software is provided), but a general issue with the phone and band/signal interpretation coupled with the apparent innability to go off 4G
Refards!
Click to expand...
Click to collapse
ok when it connects to LTE it says "4G LTE". The 4G that you are getting is probably HSPA or something. And we had someone on here a few months back using Claro in Argentina and they had to seek answers from their Claro
tabletalker7 said:
ok when it connects to LTE it says "4G LTE". The 4G that you are getting is probably HSPA or something. And we had someone on here a few months back using Claro in Argentina and they had to seek answers from their Claro
Click to expand...
Click to collapse
If "4G LTE" is 4G and "4G" is HSPA, when only a "G" appears, what band am i connecting too? Its still pretty weird that im having major signal issues in my town, but when i go to a big city my signal is even better than other phones, it seems inconsistent with the whole "bad hardware" theory. I talked to Claro and it seemed like from their end it was a non issue, can you point me to the thread to see if he got it fixed somehow?
Regards!
Nehuen said:
If "4G LTE" is 4G and "4G" is HSPA, when only a "G" appears, what band am i connecting too? Its still pretty weird that im having major signal issues in my town, but when i go to a big city my signal is even better than other phones, it seems inconsistent with the whole "bad hardware" theory. I talked to Claro and it seemed like from their end it was a non issue, can you point me to the thread to see if he got it fixed somehow?
Regards!
Click to expand...
Click to collapse
/Trolling a bit/
I'm always LMAO when I hear US people talking about that 4G scam (which is H+ for real btw)
G is for 2G
E is for 2G+
3G is 3G
H is 3G+
H+ is 3G++ (an intermediary protocol up to 42MBps)
4G is LTE (up to 150Mbps in the EU most of the time)
4G+ is LTE-A (which is available in most of the EU, SK & JP) - up to 600Mbps, 200MBps in most tests
I've not heard of an app that could modify the way the phone "clings" to 4G LTE, since that might likely be the modem firmware doing it on its own.
RedWave31 said:
/Trolling a bit/
I'm always LMAO when I hear US people talking about that 4G scam (which is H+ for real btw)
G is for 2G
E is for 2G+
3G is 3G
H is 3G+
H+ is 3G++ (an intermediary protocol up to 42MBps)
4G is LTE (up to 150Mbps in the EU most of the time)
4G+ is LTE-A (which is available in most of the EU, SK & JP) - up to 600Mbps, 200MBps in most tests
I've not heard of an app that could modify the way the phone "clings" to 4G LTE, since that might likely be the modem firmware doing it on its own.
Click to expand...
Click to collapse
Then this is even weirder, because is G is not 3G, but 2G it means that the phone NEVER connects to the major band that all of my previous phones and Claro users connect to. Is there anyway to force to only connect to 3G?
Regards!
i have the G european model, in my town i have bad lte signal 1/2bar, when with my previously xiaomi mi4c was got 4/5 bars (maximum). In the big town i have got in the most of cases 4/5 bars. I think the "signal problems" are relatives of a lack of somehow software. i told this because i've read with the china model with the last updates an improvement of the signal reception of the phone.
Nehuen said:
Then this is even weirder, because is G is not 3G, but 2G it means that the phone NEVER connects to the major band that all of my previous phones and Claro users connect to. Is there anyway to force to only connect to 3G?
Regards!
Click to expand...
Click to collapse
You can however force a specific protocol indeed, but you will lack the ability to autoswitch networks. Just download 4G LTE Switch (here) which is a glorified secret code dialer. Just click on prefered network and change at your convenience (4G LTE only, WCDMA only - H+ - and so on). Remember that if you force 4G LTE in an area in which you have no coverage, you won't have internet, and no 2G/3G fallback (so no texts, no calls)
I don't know if this is the same problem, but my wife has an iPhone 6+ and I have an A2017U on B29 stock root. We both use the same network (Movistar Mexico) and while her iPhone often registers LTE, my A7 often registers 4G or even E in the same place. The A7 is receiving the same bands but appears to be "choosing" or locking into the slower protocols more often.
EDIT: NEVER MIND… an xposed module was messing with my network settings. Fixed it. Now I get LTE right away.
nuserame said:
EDIT: NEVER MIND… an xposed module was messing with my network settings. Fixed it. Now I get LTE right away.
Click to expand...
Click to collapse
Which module?
What if flash any Custom OS?Would it give better signal ?

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