Hello to all,
I have a ZenFone 2 Laser (ZE500KL). Asus support said me that is a Taiwanese version.
The issue is that is not working with LTE network in my country, only with 2G and 3G. Here is used AWS1 that is the same AWS band 4 (1700/2100 MHz) 1700 for uplink and 2100 for downlink. Asus support said me that I have nothing to do since is a hardware issue because the antenna doesn't work in 1700/2100.
Is there a way to know if this handset could be enabled to work with LTE AWS Band 4?
Thanks in advance for any help.
Regards
First thing first, I'm sorry if my reply did not help you, and this is based on my limited understanding...
Simple answers would be nothing, nothing you can do if this is "hardware" limitation as asus told you.
Now the explanation, note that I'm not knowledgeable about this thing, so I don't think could give a meaningful explanation.
From what I've read, LTE, on different country use different band (1700, 2100, etc). And by that, just say *not the real reason, just play along with it*, "device built by limiting hw capabilities to certain band, to work on region A, because that device didn't meant to work/used outside region A" . This might the reason, you could see asus with WW or TW variant. They limit the device hardware to work only with certain band range.
This is hardware, not software/firmware (if you compare it to like some "unlocked provider device") . So you can't do anything about it.
This is like, using CDMA phone with GSM card, they work at different band. AFAIK it didn't work, cmiiw.
Oh, IIRC, old phone (before Android born) mostly have triband (GSM) you might won't be able to use your device outside your country. Then, newer phone, till now, use quad band to support usability around the globe. cmiiw
I hope you get what I'm trying to say there~
I don't know what it mean about LTE aws 1 / aws 4, I don't think this is just band length (1700/2100).
# sorry for my bad english
Sent from my ASUS_Z00RD using XDA Labs
Related
Hello there. Some of the Vibrant users are not from the USA, just like me. Here we don't have the 1700 band that T-Mobile uses, but we still use 2100 MHz for 3G.
Well, demetris_I has told me that there are much better modems for us european users from devices like the I9000. The problem is that CM7 is not able to make those modem work. At least, this is what he told me.
Flashing those modems (that are compatible with our Vibrants) makes it impossible to connect to 3G. We know that it's a software problem, so it would be fixed if a developer is kind enough to investigate the way to make CyanogenMod use the correct bands.
This is a request for any of you with dev skills to have a look into this. We are very good testers, so any change you do could be checked.
Please, have into account that we are absolutely alone in Europe, we are only a low percentage of the Vibrant users, but we really need to have a better modem that fits our networks.
Thanks a lot and I hope to have a lot of answers to this. Please, don't forget us.
Pm scrizz
Sent from my SGH-T959 using XDA App
SuperJMN said:
Hello there. Some of the Vibrant users are not from the USA, just like me. Here we don't have the 1700 band that T-Mobile uses, but we still use 2100 MHz for 3G.
Well, demetris_I has told me that there are much better modems for us european users from devices like the I9000. The problem is that CM7 is not able to make those modem work. At least, this is what he told me.
Flashing those modems (that are compatible with our Vibrants) makes it impossible to connect to 3G. We know that it's a software problem, so it would be fixed if a developer is kind enough to investigate the way to make CyanogenMod use the correct bands.
This is a request for any of you with dev skills to have a look into this. We are very good testers, so any change you do could be checked.
Please, have into account that we are absolutely alone in Europe, we are only a low percentage of the Vibrant users, but we really need to have a better modem that fits our networks.
Thanks a lot and I hope to have a lot of answers to this. Please, don't forget us.
Click to expand...
Click to collapse
You need to be specific. Based upon your post, there is no way to identify what to begin working on.
1. What modems are you trying to flash?
2. Be specific.
3. What are the results you are getting? "doesn't work" isn't an answer. Does 3g connect? No? Does 2g data work? Do you get voice calls?
4. Be specific.
5. The Vibrant comes out of the box with UMTS Band I (2100mhz) support. Do the default T-Mobile radios work on non-CM7 Roms?
6. Be specific.
Hi.
Let me clear some things up.
Modems from other phones work, but only on gsm basebands.
WCDMA is not connectable until we flash any Vibrant modem.
Well this is the whole idea,
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 1700 / 1900 / 2100
Those are the bands supported by the vibrant.
So we should be able to connect to WCDMA (2100)as we are able to connect to GSM(GPRS), with other modems.
So Vibrant CM rom refuses to connect to WCDMA 2100(Europe) but gladly connects to GSM Bands (900/1800 tested) and i think is a rom specific support problem.
We need a capable developer to test and fix this issue by just looking at the Captivate/GalaxyS code git for specific changes that dont reflect on the vibrant code from the same git.
Example:
Code tells the phone to look for WCDMA to 1700 but as we flashed the phone with a different modem the initial req is not given so the phone stucks at no signal.
If you flash back a vibrant modem signal checking code executes right and proceeds to connect to next available signal that is 2100.
Sorry for the delay. I was at work.
demetris gave a very good explanation of what it happens. The fact is that the Vibrant's hardware can connect to 3G using HSDPA 1700 / 1900 / 2100.
When the Vibrant is using a modem made for it (Vibrant with Vibrant modem) you can connect to every band it does support.
When a modem from I9000, Fascinate, Captivate,… is flashed, everything works as expected, so I think they are almost identical in functionality, but SOMETHING makes it impossible for it to connect to any of the 3G bands.
When in the dialpad you enter the code to select bands, you can see/select the bands you wish to use, but it just refuses to connect.
Why do we want this working? Because for sure, modems from the european version (I9000) might be optimized for our networks and be less battery consuming or have increased coverage. demetris tested them and noticed an improvement.
So, we are asking you to look into it so modems from the I9000 (priority) becomes usable for us.
I hope to be specific enough this time. Of course, I offer myself as a beta tester. My carrier uses WCDMA 2100 MHz for 3G (UMTS).
Thanks in advance and don't hesitate to ask us!
so many of you have probably enabled your 4g LTE chip on your device but when i try the trick it doesnt work. after research i found that australia uses a different band of LTE to what the nexus can use. a friend of mine suggested that i root and flash a custom radio that works on the australian bands so i can enable LTE. Does anyone know where i could find this radio and/or if it actually exits? and if it does how do i use it?
Hi,
Can't recall where but somewhere it said it only has physical support circuits , I think amplifiers, for one specific band to support LTE. That would mean its not possible without he mod to utilize another band for LTE.
Cheers
ice_cold17 said:
so many of you have probably enabled your 4g LTE chip on your device but when i try the trick it doesnt work. after research i found that australia uses a different band of LTE to what the nexus can use. a friend of mine suggested that i root and flash a custom radio that works on the australian bands so i can enable LTE. Does anyone know where i could find this radio and/or if it actually exits? and if it does how do i use it?
Click to expand...
Click to collapse
There is no LTE chip in the Nexus 4, band 4 AWS LTE (1900 MHz) is natively supported by the processor, and is the only LTE you can connect to. Check and see what frequency and band LTE is in you area, if its any thing other than band 4 AWS 1900 MHz you can't connect to it no matter what you try and do. Google also fixed the LTE exploit in version 4.2.2 so you would have to either roll back to version 4.2.1 or use a ROM that supports LTE, they say so in their description. But again check to see what frequency and band LTE is in your area as that's what will decide for you what you can do.
So got my new baby, and I love the stock Android UI.
But I got issue connecting to LTE networks here in Germany. A friend of mine bought it in the US store and sent it over to Germany. 3G no problem, but LTE isn't working.
I checked the tech specs, and it says 4G LTE (700, 850, AWS, 1900 MHz). Here in Germany T-Mobile is using Band 3 (1800 Mhz) and Band 20 (800 Mhz) So there is the culprit.
Is this a hardware restriction, or could be solved via software? Maybe flashing a different baseband?
Unfortunatly on the Phone Info screen, you cannot change the GSM/UMTS band. The list is empty. It worked on my Nexus 4 though...
Maybe its possible with a modified modem/radio, dunno it thats correct though and how to do it. There is a radio thread on this forum http://forum.xda-developers.com/showthread.php?t=2192025, check it there.
It might be possible to change the bands using QPST (you won't be able to flash the international modem) there is already a thread on the I337 forums http://forum.xda-developers.com/showthread.php?t=2291589 that has a tutorial for enable AWS bands on the device. The process should be roughly similar assuming the device's hardware can operate at those frequencies.
If it works you will lose north American bands until you rehash the I9505G configuration back.
Sent from my GT-I9505 using xda premium
Hello I have a problem with my LG G2 (D802) Europe model! My carrier have relase 4G in bands 38B 2600 MHz TDD buth lg g2 d802 not have this bands, has instead bands TDD 40B 2300 Mhz!
I can add this bands on my g2?
The new license the company in 2600 MHz band (TDD) has been acquired by a process of transfer of RCS & RDS and 2K Telecom, with the agreement of the National Authority for Management and Regulation in Communications (ANCOM).
Click to expand...
Click to collapse
Thank you in advance! And sorry for my bad English!
Unfortunately these bands are not something we can add/remove but some chips are hardware capable only that they're restricting them for some reasons.
LE: https://www.youtube.com/watch?v=AYe4CLJzmQg#t=76
Try to follow the clip above if you are from RO(the guy who made this wrote the instructions in romanian), should give you what you wanted but apparently everybody is still complaining about band 38 not doing much
I'm also in the same situation, i keep finding stuff that leads me to think that it's possible, first of all the snapdragon 800 supports LTE band 38, there are several threads that have unlocking guides and claim in the first post that several devices have been unlocked (I did not manage on mine unfortunately).
From what i've seen the One plus one has managed to unlock that LTE band, a Galaxy S5 and several phones that have MTK chipsets (with only root access and an app).
So unlocking LTE bands is not impossible (if there is hardware support of course) .
Really hope someone will give us some useful info on this. (we got 4g and extra 10gb of traffic for free, but only on 4g)
i need the band 4(aws) but the XT1642 just have LTE bands 01/05/07/08/19/20/28
have any way to change or chose the bands? or its hardware
Thanks
I am also wondering about this. Someone please give it a productive thought.
Any ideas on this? I've read about this method http://forum.xda-developers.com/cro...ad-progress-please-leave-im-updating-t2871269 and it should work with the Qualcomm Proccessor of the Moto G4 plus, but I don't know the code to activate the Diag.
Hardyblack said:
Any ideas on this? I've read about this method http://forum.xda-developers.com/cro...ad-progress-please-leave-im-updating-t2871269 and it should work with the Qualcomm Proccessor of the Moto G4 plus, but I don't know the code to activate the Diag.
Click to expand...
Click to collapse
There are limitations because of the hardware bits (RF amps) that are missing. For example if the radio works on LTE band 17 (DL 740Mhz, UL 710MHz), then it might be tricked to work in LTE band 12 (DL 737.5MHz, UL 707.5MHz), they are "close enough" to work.
Also I had a Alcatel phone that was sold by T-Mobile with one of the existing bands (LTE 5) de-activated because it was not used by T-Mobile. After unlocking the phone (legally) it would still work poorly on AT&T network - and then I was able to activate that band by using the above software - because the needed RF amps where already present inside.
LTE band 4 AWS is a special animal, the DL and UL frequencies are VERY far apart. Not matching anything else, so even if we can program the radio to work in those bands, the output RF amps will just not be able to perform.
List of frequencies: http://niviuk.free.fr/lte_band.php
SoNic67 said:
There are limitations because of the hardware bits (RF amps) that are missing. For example if the radio works on LTE band 17 (DL 740Mhz, UL 710MHz), then it might be tricked to work in LTE band 12 (DL 737.5MHz, UL 707.5MHz), they are "close enough" to work.
Also I had a Alcatel phone that was sold by T-Mobile with one of the existing bands (LTE 5) de-activated because it was not used by T-Mobile. After unlocking the phone (legally) it would still work poorly on AT&T network - and then I was able to activate that band by using the above software - because the needed RF amps where already present inside.
LTE band 4 AWS is a special animal, the DL and UL frequencies are VERY far apart. Not matching anything else, so even if we can program the radio to work in those bands, the output RF amps will just not be able to perform.
List of frequencies:
Click to expand...
Click to collapse
I'd love to say that I understood you but I'm very ignorant about bands and frequencies.
I read that the QC SnapDragon 617 has a X8 LTE Modem (can't link because I'm new, but it's on the QC webpage) which has the Snapdragon Global All Mode, and it's supposed to support band 4 AWS. I don't know if that helps with the output RF amps, or I'm totally doomed.
Yes the X8 Modem supports the bands. But it needs something else to work. Those bits are soldered on the US version and not on the EU one. Similar, on the EU one there is band 20 that is not present on the US hardware.