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Repeatedly Losing Data Connectivity

My Nexus 5 frequently loses mobile data connectivity. Its been happening since I purchased it, but the frequency with which it happens has increased since I flashed the M1 snapshot of CM. I've since flashed the second snapshot from early January, but it has not made any difference.
This is the same sim card that ive used with my nexus 4 and my htc one without any problems, and I've made no changes in my wireless carrier.
Does anyone have any thoughts as to why this happens?

Try a different,maybe older, radio. If that doesn't help go back to stock and see if it persists.
sent from my Hammerhead Nexus

Flash the Nexus factory image. If that fixes it, its a problem on CM's side
Sent from my Nexus 5 using XDA Premium 4 mobile app

hi.
i was this problem too, not exaactly the same, but somehow similar. I have 3g connection, the signal bar shows H and somtimes 3G, but the speed is freaking slow, worse than 2g. Initially I thought its something wrong with my phone, been changing ROMS to see if it is the issue, but no. Then I flash the latest baseband / radio, and still doesnt help.
Be reminded I am on 4G plan, but never had any 4g network ( it is not because i'm not in an area with no 4g network )
I was very frustrated and emo at the same time, thinking of RMA the phone, thought it is the radio chip problem.
but then... I called my telco, asking why I'm experiencing slow connection and bla bla, and I don't have 4g network. They keep saying my network is working perfectly, and running normally, I requested them to reset my network connection. They agreed and asked me to turn off the phone for a few minutes then they reset the network for me.
After that, everything is running perfectly.
This was 2 days ago. And guess what, I don't have any 4g connections now again. Stupid telco, I'm going to call them later when i'm free. grrr.
but please make a call to your telco and ask them.
Hope that helps

Mobile data cutting out

Hi all,
I am having a problem with my data connection, quite often when I am using my phone the internet connection icon next to the signal bars keeps disappearing and I loose connection, it's normally only a minute or so but it is quite annoying as it is quite regular and causes some downloads to fail.
I have tried different ROMs but I have the issue remains.
I am running a UK xt1032 device and couldn't wait for the official 4.4 ROM so I flashed the us global gsm rom, ( downgraded my bootloader to the 4.3 version so I could flash CWM ) but have since reflashed the 4.4 boot loader, but I was wondering if flashing the us ROM could could be affecting my connection as I believe the primary difference between UK and us ROMs is the radio frequency ( I might be wrong ).
So... Is anyone else having this issue, or is this a CM based ROM bug ( as all the roms I have used have been CM based ) or could my phone be faulty, or could it just be down to my network ( giffgaff UK ) as I do make the most of there unlimited data and I'm not sure if they giving me low priority.
Sorry for the long winded post, and thanks for any advice/feedback.
Sent from my XT1032 using xda app-developers app

Well not sure this will help you but lots of people in the uk have been having data cut out after upgrading to kitkat but that is accompanied by other issues.lots of info on the motorola forum.
https://forums.motorola.com/posts/48fb0b8150?page=1
Im with giffgaff and after i upgraded it was a nightmare,data cut out,random airplane mode with no symbol showing etc. i have now downgraded too jellybean and the phone is flying and has no issues at all.probably a different issue with you but thought i would mention it.

You flashed the US Radio firmware. Changing ROMs won't affect that. You have to flash the UK Stock firmware image which includes the UK Radio firmware.
Related post:
http://forum.xda-developers.com/showpost.php?p=49801348&postcount=3​

Hi all just thought I would post an update, I seem to have found a solution for my problem,
I had to go to network operators and select another network ( my network is giffgaff ) so I selected Vodafone, waited for the no service to kick in, then instead of selecting giffgaff I selected O2 and since then I have had NO drop outs, and its been almost 24 hours
Hope this helps.
Sent from my falcon using xda app-developers app

plewis1981 said:
Hi all just thought I would post an update, I seem to have found a solution for my problem,
I had to go to network operators and select another network ( my network is giffgaff ) so I selected Vodafone, waited for the no service to kick in, then instead of selecting giffgaff I selected O2 and since then I have had NO drop outs, and its been almost 24 hours
Hope this helps.
Sent from my falcon using xda app-developers app
Click to expand...
Click to collapse
Good thinking,keep us informed if it continues to work as i will update mine then .

Still going strong although I have a G at the moment rather than a H , but most importantly there is always an icon there
Nobody is perfect, I am nobody, therefore I am perfect.

STILL no visible problems with my signal
Nobody is perfect, I am nobody, therefore I am perfect.

Id recommend to downgrade back to 4.3 mate,my girlfriends moto g (Vodafone) (fully stock not rooted or unlocked)ota to kitkat4.4 had signal issues 24/7 mine was unlocked and rooted and had intermittent signal issues, reflashed 4.3 on both and no signal loss at all,in fact data speeds improved, on giffgaff on kitkat I couldn't get over 1 Mbps at home now on jb its pulling between 2 and 5 Mbps

Id recommend to downgrade back to 4.3 mate,my girlfriends moto g (Vodafone) (fully stock not rooted or unlocked)ota to kitkat4.4 had signal issues 24/7 mine was unlocked and rooted and had intermittent signal issues, reflashed 4.3 on both and no signal loss at all,in fact data speeds improved, on giffgaff on kitkat I couldn't get over 1 Mbps at home now on jb its pulling between 2 and 5 Mbps
Click to expand...
Click to collapse
I did reflash 4.3 but got board not being able to flash any roms, as this was one of the main reasons for me buying this phone. But since connecting to O2 signal seems fine
Nobody is perfect, I am nobody, therefore I am perfect.

OTA update killed all data connections

I am on T-Mobile since April and everything has been fine except the known LTE handoff issue, I just keep the phone in UMTS always.
The night of Oct 28th I received an OTA (not a system update) and I guess it changed radio settings or updated the firmware. Ever since, NOTHING I do will get the phone to pick up ANY data signal on T-Mobile. Did Verizon decide to block the Maxx from use on other networks???
On wifi everything is fine, but I get no GSM data, no Edge, no 3G, no HSPA and no LTE. I can't receive any media text messages either.
Can anyone tell me what the hell happened?
100% stock Droid MAXX, on 4.4.4
23.3.24.obake-maxx.verizon.en.US
MSM8960PRO_BP_23255.127.76.00R
3.4.42-gd47915e-00002-g37bce85 [email protected] #1
Phone is non-Dev edition (as far as I know), I'd be happy to even put another ROM on this thing if possible, I know there is a MotoX ROM that also fixes the LTE issue on the Maxx.
I use this as my primary/business phone so it's really unconvenient to have no data while im out and about during the day!
Please help!

seandean41 said:
I am on T-Mobile since April and everything has been fine except the known LTE handoff issue, I just keep the phone in UMTS always.
The night of Oct 28th I received an OTA (not a system update) and I guess it changed radio settings or updated the firmware. Ever since, NOTHING I do will get the phone to pick up ANY data signal on T-Mobile. Did Verizon decide to block the Maxx from use on other networks???
On wifi everything is fine, but I get no GSM data, no Edge, no 3G, no HSPA and no LTE. I can't receive any media text messages either.
Can anyone tell me what the hell happened?
100% stock Droid MAXX, on 4.4.4
23.3.24.obake-maxx.verizon.en.US
MSM8960PRO_BP_23255.127.76.00R
3.4.42-gd47915e-00002-g37bce85 [email protected] #1
Phone is non-Dev edition (as far as I know), I'd be happy to even put another ROM on this thing if possible, I know there is a MotoX ROM that also fixes the LTE issue on the Maxx.
I use this as my primary/business phone so it's really unconvenient to have no data while im out and about during the day!
Please help!
Click to expand...
Click to collapse
Try a factory reset, and reset your APN to default, and re-enter the settings. As I stated in the other thread you posted in, update is working great for me, and Verizon can't lock the Maxx/Ultra/M to their network as part of the FCC's Block C agreement.

thenameisnigel said:
Try a factory reset, and reset your APN to default, and re-enter the settings. As I stated in the other thread you posted in, update is working great for me, and Verizon can't lock the Maxx/Ultra/M to their network as part of the FCC's Block C agreement.
Click to expand...
Click to collapse
Ok, I did the factory data reset and and it's still the same.
One strange thing I noticed is that it will say 3G or 4GLTE in the status bar right next to the signal strength, but it's grayed out, and only present when wifi is turned on. As soon as I turn wifi off, the 3G or 4G logo disappears instantly.
It did this both before and after the reset. regardless, when I'm not on wifi I have ZERO access to data networks.
Phone worked great on tuesday, and now it's pretty much useless after Verizon update. How can I roll back to the previous firmware ?

you could try replacing the radio from previous version.

pijes said:
you could try replacing the radio from previous version.
Click to expand...
Click to collapse
Could you point me to a walk-through for this and is it possible on a stock non-developer edition?

1FF-obake_verizon-user-4.4.4-SU5-23-release-keys.xml.zip REVERT
seandean41 said:
I am on T-Mobile since April and everything has been fine except the known LTE handoff issue, I just keep the phone in UMTS always.
The night of Oct 28th I received an OTA (not a system update) and I guess it changed radio settings or updated the firmware. Ever since, NOTHING I do will get the phone to pick up ANY data signal on T-Mobile. Did Verizon decide to block the Maxx from use on other networks???
On wifi everything is fine, but I get no GSM data, no Edge, no 3G, no HSPA and no LTE. I can't receive any media text messages either.
Can anyone tell me what the hell happened?
100% stock Droid MAXX, on 4.4.4
23.3.24.obake-maxx.verizon.en.US
MSM8960PRO_BP_23255.127.76.00R
3.4.42-gd47915e-00002-g37bce85 [email protected] #1
Phone is non-Dev edition (as far as I know), I'd be happy to even put another ROM on this thing if possible, I know there is a MotoX ROM that also fixes the LTE issue on the Maxx.
I use this as my primary/business phone so it's really unconvenient to have no data while im out and about during the day!
Please help!
Click to expand...
Click to collapse
I have a droid maxx on t mobile and i have had no problem using H+ instead of LTE for txting and data here in chicago...
but last night i accepted the XLTE (1FF-obake_verizon-user-4.4.4-SU5-23-release-keys.xml.zip) OTA and quickly realized that t mobile data no longer worked. I tried to revert back using RSD lite but that failed due to downgrade protection...i was thinking i would have to just flash a 4.4.4 gummyrom over stock and move on but then i remembered i had an old twrp backup of 1FF-obake_verizon-user-4.4.4-SU4.21-release-keys.xml.zip from earlier in september
you must have an unlocked bootloader and twrp installed to restore the backup but the restore was successful and bypassed the downgrade protection...gsm carrier data was once again working...
i will post a link to my twrp backup once it finishes uploading...and if anyone else has a 1FF-obake_verizon-user-4.4.4-SU4.21 stock twrp backup they could share that would also be a huge help
ps.youre only chance to unlock your bootloader is sunshine or stumproot or another on of jcases masterpieces if it wasnt already patched by this last XLTE update

seandean41 said:
Could you point me to a walk-through for this and is it possible on a stock non-developer edition?
Click to expand...
Click to collapse
Go inside the Droid Ultra Original Android Development and look for thread with [Radio] in the title. The latest that comes with VoLTE update was posted by CrazyRussianXDA (this is the one inside your phone now), previous versions were by Topsnake. Create a folder called fastboot and extract the files there. You must download the fastboot tool here - http://forum.xda-developers.com/showthread.php?t=2317790, install it into the same fastboot folder. Just follow the simple steps and yes it is possible to do it on stock non-developer version. Just for precaution, do not copy and paste the command, type them in.

So I haven't changed a thing on the phone. This morning I re-entered the SAME APN info yet again with no luck.
Today around noon, while driving my phone suddenly starts getting emails and now seems to be working fine. Even the LTE handoff issue on T-Mobile seems to be gone.
I have no clue. . . but it works now!
I GREATLY appreciate everyone's help on this matter! Maybe an issue to watch out for in coming weeks ?

seandean41 said:
So I haven't changed a thing on the phone. This morning I re-entered the SAME APN info yet again with no luck.
Today around noon, while driving my phone suddenly starts getting emails and now seems to be working fine. Even the LTE handoff issue on T-Mobile seems to be gone.
I have no clue. . . but it works now!
I GREATLY appreciate everyone's help on this matter! Maybe an issue to watch out for in coming weeks ?
Click to expand...
Click to collapse
seandean41...Are you saying that your phone is not having any issues with T-mobile now? Like it fixed the LTE handoff issue?

jmaclean62 said:
seandean41...Are you saying that your phone is not having any issues with T-mobile now? Like it fixed the LTE handoff issue?
Click to expand...
Click to collapse
Yea I have it set to automatically select network now and it's sitting on my desk in LTE mode, yet I can pick up the phone and make a call no problem.
It used to always drop the first call and then if you redialed while it was in HSPA it would make the call.
Texting working fine too.
T-mobile had told me that they were having some data issues in my area, so I wonder if being halfway across the county today at lunch did something. The original problem was definitely something with the phone because if wifi was turned off, it wouldn't even display a G, E, 3G, or 4G logo. And with wifi on, the logo was grayed out and totally nonfunctional.
but maybe talking to another tower did something with the radio. . . . . . no idea really. Shooting in the dark here!

seandean41 said:
Yea I have it set to automatically select network now and it's sitting on my desk in LTE mode, yet I can pick up the phone and make a call no problem.
It used to always drop the first call and then if you redialed while it was in HSPA it would make the call.
Texting working fine too.
T-mobile had told me that they were having some data issues in my area, so I wonder if being halfway across the county today at lunch did something. The original problem was definitely something with the phone because if wifi was turned off, it wouldn't even display a G, E, 3G, or 4G logo. And with wifi on, the logo was grayed out and totally nonfunctional.
but maybe talking to another tower did something with the radio. . . . . . no idea really. Shooting in the dark here!
Click to expand...
Click to collapse
I just applied the upgrade. Ultra on T-Mobile. I have no data anymore. I can't even pull up a web page. I am able to call and text no problem. The strange thing is at the beginning of October I moved from Verizon to T-Mobile. Verizon sent me the Android upgrade. Hopefully this will resolve itself over time. I've tried rebooting the phone a couple of times and messing with the mobile settings...but nothing. Phone info app shows me it's registered to T-Mobile and the Signal Strength is around -110dBm. It shows me GSM Service as "In service" and the GPRS Service as "Connecting", Network type LTE, GSM disconnects:==========DATA========
(UPDATE) I called t-mobile support and they were excellent. Short and to the point they stepped me through adding the APN info, and data is now working again. Prior to the upgrade it was working without any APN info. The old problems I was having with SMS messages not being sent, and having to redial 2 or 3 times to place a call are gone. My Verizon Droid Ultra is now working perfectly on T-mobile. Just ran a speedtest on 2-3 bars with 4GLTE and I got 13Mbs down and 8Mbs up

i just picked up a maxx and EVERYTHING works. lte is crazy fast as well. latest update too...

su5 tmobile data
kdm212 said:
i just picked up a maxx and EVERYTHING works. lte is crazy fast as well. latest update too...
Click to expand...
Click to collapse
yes tmobile data does work on 1FF-obakem_verizon-user-4.4.4-SU5-24 (23.3.24)
actually...the H+ LTE hand off is fixed along with any sms/mms issues
fxz/take the ota...
it doesnt connect automatically any more...
go to settings - more... - mobile networks - access point names - add new apn...
name: T-Mobile
APN: fast.t-mobile.com
thats all you have to change...try to make a call/txt...reboot once...
4GLTE on the droid maxx on tmobile

[SOLVED] Horrible cell reception after update to Android L

I'm getting horrible cell reception after updating to Lollipop. I've been using Mahdi-ROM 4.4 for months and I've been on latest radio M8974A-2.0.50.2.21 since it was released.
Now I'm on Android 5.0 (XtraSlim Rom), didn't touch the radio at all and I'm getting very bad reception and constant signal drops.. about 50% without signal in contrast to about 2-3% in the same area as before.
I did a factory reset for sure, wiped system, cache and so on, tried to restart and restart again.. then I flashed the radio again but nothing worked. don't know what to do next, any advice?

-sheldor- said:
I'm getting horrible cell reception after updating to Lollipop. I've been using Mahdi-ROM 4.4 for months and I've been on latest radio M8974A-2.0.50.2.21 since it was released.
Now I'm on Android 5.0 (XtraSlim Rom), didn't touch the radio at all and I'm getting very bad reception and constant signal drops.. about 50% without signal in contrast to about 2-3% in the same area as before.
I did a factory reset for sure, wiped system, cache and so on, tried to restart and restart again.. then I flashed the radio again but nothing worked. don't know what to do next, any advice?
Click to expand...
Click to collapse
Are you now on LTE? Maybe you were on 3G before? That's all I can think of, especially since you are using the same radio.

No, I'm on 3G as before.. and it's not only the mobile data, the whole cellular network gehts lost.
Hello again.. for anyone facing the same issue: It's a known problem with APN settings for the german provider O2. It can be easily solved, look over here for more information: http://stadt-bremerhaven.de/android5-lollipop-nexus5-besitzer/

Nexus 5 5.1 Radio

Greetings,
First off as general context, the greatest complaint that I have had with the Nexus 5 has always been its radio and I've been a user since Nexus 5 launch. I am a Canadian user on the Rogers network, and I have found many areas that other phones (any of the iPhones, Samsung Note 2, Samsung S4, HTC One m8) receive signal on the Rogers network (at least 2 bars) while I have zero reception. Most of these areas are basement level areas or complete concrete buildings. Has anyone else encountered this problem? This is especially annoying as I tend to be in basement areas often.
Second off, I am a rooted user on Carbon ROM for 4.4.4 KitKat but running 4.4.2 radio. I've found that the 4.4.4 radio was highly unstable for me, losing signal every few minutes or so while being in areas where I receive full bars and remaining stationary. Thus I reverted to 4.4.2 radio only and it fixed my problem. Now that 5.1 build is out, I would like to update only my radio and bootloader for 5.1 as I am not ready to enter Android 5.x with the memory leak problems and other features. All i would like to try out is mainly the radio to see if it fixes my first issue. Would flashing only the radio and bootloader of 5.1 be okay? I'm not sure if there is some sort of problem with flashing radios and bootloaders of a whole different build (5.x onto a 4.x). Thanks.

xtremeryo said:
Greetings,
First off as general context, the greatest complaint that I have had with the Nexus 5 has always been its radio and I've been a user since Nexus 5 launch. I am a Canadian user on the Rogers network, and I have found many areas that other phones (any of the iPhones, Samsung Note 2, Samsung S4, HTC One m8) receive signal on the Rogers network (at least 2 bars) while I have zero reception. Most of these areas are basement level areas or complete concrete buildings. Has anyone else encountered this problem? This is especially annoying as I tend to be in basement areas often.
Second off, I am a rooted user on Carbon ROM for 4.4.4 KitKat but running 4.4.2 radio. I've found that the 4.4.4 radio was highly unstable for me, losing signal every few minutes or so while being in areas where I receive full bars and remaining stationary. Thus I reverted to 4.4.2 radio only and it fixed my problem. Now that 5.1 build is out, I would like to update only my radio and bootloader for 5.1 as I am not ready to enter Android 5.x with the memory leak problems and other features. All i would like to try out is mainly the radio to see if it fixes my first issue. Would flashing only the radio and bootloader of 5.1 be okay? I'm not sure if there is some sort of problem with flashing radios and bootloaders of a whole different build (5.x onto a 4.x). Thanks.
Click to expand...
Click to collapse
The bootloader and radio are separate from everything else on the Nexus 5, you can use any version with any version of Android.