My m7vzw seems to be stuck in 3g mode. I'm running cyanogenmod 11, snapshot 10. I've tried to reflash to the stock ROM and updated the radio, but nothing seems to help.
The strange thing is that it will work perfectly fine with LTE if I go to Settings -> Mobile Networks -> Preferred Network Type, and choose "LTE". But, when that settings is in place, I can't make phone calls. If I change it back to "CDMA+LTE/EVDO", it goes straight into 3g mode. So, I don't think it's a problem with the radio being unable to use 4G, it seems more like a "preference" thing.
Any ideas?
Related
Anyone on froyo have this problem?
This includes anyone using custom rom
The only way I can get it to switch back to 3G is if I use samserv debug to change my band to WCDMA only.
if i do the following I get this problem:
1) From WCDMA/GSM (auto) or WCDMA only -> Change to GSM only
2) I get GPRS signal -> then i get emergency call only due to bad 2g reception in my area
3) Change GSM only to either WCDMA only or Auto - it does not change back to 3G and stays as is in GPRS mode, and I lose connection. Won't turn back on to 3G again.
Never happened in 2.1. Only in 2.2.
The problem with staying on 1 band is:
My home has bad GSM signal, but 3G does not have a very wide coverage in my region. So in some areas, if there is no 3G signal I lose connection totally and people cannot get me. When I am at home I cannot be on GSM because I get no connection. Whereas 3G signal is not too bad where I live.
Anyone have any ideas how to solve this? Or is this a hardware issue? I'm not entirely sure if its hardware related because I can get the bands if I force it to via debug. But it won't auto switch nor will it switch inside the regular settings menu.
On all 2.1 versions I never had this issue.
On 2.2 stock DXJPA i started having this problem.
Now on darky 8.0 and this problem is still here.
HELP!
mystombox said:
Anyone on froyo have this problem?
This includes anyone using custom rom
The only way I can get it to switch back to 3G is if I use samserv debug to change my band to WCDMA only.
if i do the following I get this problem:
1) From WCDMA/GSM (auto) or WCDMA only -> Change to GSM only
2) I get GPRS signal -> then i get emergency call only due to bad 2g reception in my area
3) Change GSM only to either WCDMA only or Auto - it does not change back to 3G and stays as is in GPRS mode, and I lose connection. Won't turn back on to 3G again.
Never happened in 2.1. Only in 2.2.
The problem with staying on 1 band is:
My home has bad GSM signal, but 3G does not have a very wide coverage in my region. So in some areas, if there is no 3G signal I lose connection totally and people cannot get me. When I am at home I cannot be on GSM because I get no connection. Whereas 3G signal is not too bad where I live.
Anyone have any ideas how to solve this? Or is this a hardware issue? I'm not entirely sure if its hardware related because I can get the bands if I force it to via debug. But it won't auto switch nor will it switch inside the regular settings menu.
On all 2.1 versions I never had this issue.
On 2.2 stock DXJPA i started having this problem.
Now on darky 8.0 and this problem is still here.
Click to expand...
Click to collapse
I too have the same problem.I tried flashing stock firmware via odin and even officially tried to upgrade to froyo but still the problem persists.
somebody help
Was originally running OMJ Sprint Rom and wanted to try out CM so did a wipe and flashed the CM rom. Everything was working except for the 3G mobile data. Somehow 4G LTE was still connected and running but that doesn't allow me to make voice calls or even text as I found out. Anyhow had to switch back to slow iPhone and now am stuck with this awesome device that can't make phone calls.
I used to successfully flash roms all the time with my EVO 4G but for some reason this has stumped me. Any help is appreciated. Currently running the Bad Boyz rom and cannot boot into a recovery (either CW or TWRP). HELP.
Cheers
As far as data goes did you try to reprovision the phone ##72786# yet? What happens when you switch to cdma in network settings?
Yea I tried that both over the phone with a Sprint rep and then also at the store and no luck. Also tried switching between Auto/LTE + CDMA/ CDMA only and no luck. Also not sure how to tell if it's working since it's not activated...should it still indicate a 3G connection without activation?
Hi,
I'm not getting any 3g signals on my Xperia V after flashing back to stock.
What I did:
1. Had CyanogenMod 11.x on my Phone for years. Worked just fine.
2. Switched to CyanogenMod 12.1 (Neo's Homebuilds) a few weeks ago. 3g still working.
3. Wanted to sell my phone - cause I got a new one - so flashed back to stock (9.2.A.2.5 Customized DE) using "XperiFirm" from Flashtool
4. After flashing 3g wasn't working anymore. Every time the phone switches to it I have zero bars and a red "x".
5. After switching to "only GSM" and a reboot I had a stable 2g connection. But as soon as I try to turn an 3g, I get zero bars and a red "x".
6. I switched back to CyanogenMod 12.1 (Neo's Homebuilds). Same problem - zero bars and a red "x"
7. Tried several different stock roms found in the "STOCK FIRMWARES for Xperia T,TL,V,TX" thread
8. Locked the Bootloader und used Sony PCC to repair my Phone
9. Did a factory reset
Additional info's:
I live in Germany
Provider is "o2"
Sim works in a different phone
Can't try out 4g since my provider doesn't offer it.
Everything else is working just fine
The phone is in a really good condition and would get me 100€+ easily. I really hope it is something that can be fixed.
So if anyone can offer some help I would appreciate it.
Try unbranded ftf Nordic or central Europe
Tried them all. No change.
My SI is 1270-9179 which is "Customized DE" if the information in this post is correct.
It is really wired. While finding the 3g networks in 2g mode, it behaves like there is no network at all when it switches. Doesn't even find 2g networks anymore and I have to switch do GSM only and reboot. Only emergency calls are allowed and under "Settings > About phone" it's looks like there is no SIM card.
Have u tried 4.1.2 or ICS.
And try with a different sim card
Hi,
I've got a big issue with Concept Software.
There's no LTE connection available.
I'm using latest Concept Edition 3571 on my D5803.
Any ideas how to solve?
LTE is working on Concept ROM
Is your APN correct?
Yes, APN settings should be ok.
With stock rom LTE was working properly.
Any other ideas?
I had the same problem at the beginning.
How it solved: went into service menu: *#*#SERVICE#*#* and chose LTE only.
After that, I could use the regular user interface choice and has worked ever since.
bookworth said:
I had the same problem at the beginning.
How it solved: went into service menu: *#*#SERVICE#*#* and chose LTE only.
After that, I could use the regular user interface choice and has worked ever since.
Click to expand...
Click to collapse
I've got the same issue on T-Mobile, with build number MMB29V.Z1.3571-somc. I tried the fix you suggested through the SERVICE menu and selected LTE only, but that just resulted in my phone displaying as no reception. Any other ideas anyone might have would be greatly appreciated!
What setting do you have at Wireless & networks / More / Cellular networks / Preferred network type? I have "LTE (recommended)", and my phone connects at LTE if available (with "LTE" displayed at the top) , but at older protocols if not.
Thanks for your replies but the SERVICE menu hint also doesn't work for me.
Seems that I've got the same problem as hwcl.
Greetings folks. I own a Nexus 6 XT1103 Unlocked. I'm on MetroPCS currently (piggybacks off T-Mobile LTE).
On Android 6.0.1 ROMs the device connects to LTE networks with no issue whatsoever. The real issue arises when I flash an Android 7.x ROM. The device connects to 3G (UMTS/HSDPA) and remains there even though the network setting is on LTE.
The phone momentarily connects to LTE when I reset the radio from LTE Discovery app and then reverts to 3G (the LTE signal detected just drops off to N/A). Also when the device is momentarily connected to LTE, the carrier label changes to 'No Service' even though network is available and LTE data works for those few moments. After those few moments it's back to UMTS and the carrier label returns to 'MetroPCS'
I've tried the following things to fix this (all in vain)
1. Flashed different radios (05.32, 05.34, 05.42) and bootloaders
2. Flash Android N stock image and then flash custom 7.x ROM
3. Go to the *#*#4636#*#* menu and set LTE only.
4. Resetting APN to default and manually adding APNs (both MetroPCS and T-Mobile)
I know the LTE network in the area is fine otherwise and anyway the moment I'm back on MM the issue the device connects to LTE properly (with a valid MetroPCS carrier label). This issue occurs on any Android 7.x ROM but it didn't happen as often in the Dev Preview, if I remember right.
I request all of you folks to help out if you've seen something like this or have any solutions. Cheers.
PS: Google Connectivity Services installed/uninstalled/disabled doesn't fix it
Have you tried a network settings reset? This worked for me when I lost LTE connectivity.
Settings>Backup & reset>Network settings reset.
Make sure you select network settings reset and not factory reset. They're right next to each other, so if your finger slips and you select the wrong one you'll be very unhappy.
Fixed it!! Flashing the 05.39 radio on fastboot before flashing the ROM seems to do it. Now LTE works with the proper carrier label too. I'd forgotten about the 05.39 radio as it was the one bundled with the N Dev Previews.
Cheers!