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My AT&T One X looses network connectivity PROBLEM

Hi,
I have an HTC One XL from AT&T.
It is SIM UNLOCKED and BOOTLOADER UNLOCKED. It is running CleanROM.
The problem is that my phone looses 3G connectivity and the only way to recover it it's rebooting the phone. The 3G still shows but there is no activity and the apps try to connect until they say "network problem".
I don't use it on AT&T as I live overseas. I do not have LTE so my phone is set to "WCDMA preferred"
I tried with other roms (CyanogenMOD 10, MIUI, etc.) and with almost every RADIO (flashing them with TRWP Recovery and wiping cache/dalvik after).
When 3G/HDSPA works, internet works really fast... but then it "disconnects" and everything sucks.
What do you recommend?
Best Regards.

Not a fix, but have you tried turning airplane mode on/off rather than restarting your phone?
I used to get this problem constantly with stock. Once I installed Viper, I haven't had a problem since. Don't know enough about radios to tell you if a new rom flashes a different radio though.

Try going into recovery, and wiping cache and Dalvik. Similar to area51avenger, I've had this same problem on a couple ROMs, and wiping cache and Dalvik fixed it. Might not work for everyone, but it can't hurt.

My friend i aleady tried that without any good result.
Sent from my Nexus 7 using Tapatalk 2

do you have the right APN? if you dont have the correct apn for the LTE network then it will drop connection whenever it searches for one. Maybe just run on WCDMA/gsm instead of WCDMA/GSM/LTE. It solved the problem for me on rogers here in Canada on cleanROM

I have the right APN.
Here we dont have LTE so I run the phone in WCDMA/GSM only... no LTE
Problem persist.
Also replace the phone IS NOT AN OPTION
Sent from my One X using Tapatalk 2

Is there something like fast dormacy?
Please, need help.

I've had the same experience on both rooted and non-rooted HOX's with various ROMs. I have concluded that it has nothing to do with the ROMs and more to do with the HOX itself but only when not on LTE. Before LTE was turned on in metro Detroit I had this problem constantly. I use the Airplane mode trick to resolve the issue in most cases. Now when I'm in an LTE coverage area my data is very reliable but as soon as I'm somewhere that doesn't have it (rural areas or inside with a poor signal) that ugly problem returns. It sucks because it's clearly a widespread issue that may never get resolved and I don't know who to hate at this point.

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.

[Q] Signal drop Official CM12

Using Ting (MVNO using Sprint network CDMA) ever since I upgraded from CM11 to CM12 I get intermittent loss of cell signal at times. Every couple of minutes, regardless of where I am or how strong my signal is I will lose all cellular signal for about 20 seconds, including voice and data, and then it will pop back up just like it was before.
I've tried downgrading to two different radios and nothing seems to make any difference. Like I said before this problem didn't occur until I did a clean flash of CM12.. everything was fine with CM11.
I've even wiped/reinstalled CM12 with the same issues.
Does anyone have a solution for this yet?

I recommend keeping your radios updated to LRX22C. Where did you get your ROM from?
Sent from my Nexus 5 using XDA Free mobile app

Direct from cyanogenmod

From what I've gathered, it seems that sprint networks being unreliable on cm12 has been an existing problem that may get fixed in the future.
Sent from my Nexus 5 using XDA Free mobile app

Well I fixed it.. sort of. I had tried this before but I didn't reboot the phone.
SETTINGS / MOBILE NETWORK SETTINGS/ PREFERRED NETWORK TYPE
I switched it from LTE to 3G. Looks like I might not be getting LTE coverage but it's hard to tell as LTE is sketchy at best at home and at work... and in either case I'm on Wi-fi anyway. Not a huge deal.
I had tried this before but I didn't reboot the phone after making the change. As long as I leave it on 3G my cell signal never drops. If I switch it to LTE or GLOBAL then it will randomly drop as described above.
I'll retest things after each CM12 update I install see if we get one that works!

MasterTec said:
Well I fixed it.. sort of. I had tried this before but I didn't reboot the phone.
SETTINGS / MOBILE NETWORK SETTINGS/ PREFERRED NETWORK TYPE
I switched it from LTE to 3G. Looks like I might not be getting LTE coverage but it's hard to tell as LTE is sketchy at best at home and at work... and in either case I'm on Wi-fi anyway. Not a huge deal.
I had tried this before but I didn't reboot the phone after making the change. As long as I leave it on 3G my cell signal never drops. If I switch it to LTE or GLOBAL then it will randomly drop as described above.
I'll retest things after each CM12 update I install see if we get one that works!
Click to expand...
Click to collapse
Were you able to find a solution for this that you could share?

Honestly no..I just keep it on 3G and there are no issues.
I tried about a week ago switching back to LTE but the display never showed LTE and I definitely wasn't getting LTE speeds and the signal drop returned.
TBH LTE coverage is pretty spotty in my area and I don't use a lot of data outside of Wi-Fi anyway so it's pretty much a non issue for me.
When a CM12 snapshot is released I'll probably try again.
I should add that I dirty flash the latest nightly almost every morning. When a snapshot comes out I'll wipe and clean flash things and go from there.

Update... about a month ago I did a full wipe, going back to stock, did the network updates, etc and all was well.
Then I did a fresh install of cm12.1 and every thing worked great.. Lte and all!
A couple days later I dirty flashed a nightly and got an exclamation point and no data (Wi-Fi is fine). I did find the sprint fix flash which allows me to do the network updates again from cm (had to switch to 1X for it to work) but that only yielded a temporary fix.
I did however find a workaround. If I go to my apn settings menu and change a setting on my ting (sprint mvno I use) entry then change it back and save then BINGO! I have Lte again...
That is... Until I get handed off to another tower.. Then I have to do the workaround again.

Nexus 5 - Android 5.1 LMY47D Radio Issues

Hello all,
Sparse poster, long time lurker. I just upgraded my Nexus 5 (purchased from Google, on T-mobile) from 5.0.1 to 5.1 using the OTA link available from AndroidCentral and though no other problems have been found, I am having some trouble with the radio now. When I'm on a call now, the data connection drops from LTE to GPRS, showing the 'G' next to the signal strength icon. Before upgrading from 5.0.1, this would drop to HSPA ('H') at worst. I came to expect that the 5.1 update would enable VoLTE since I thought the N5 was capable of this and the upgrade enabled VoLTE on the N6 for a buddy of mine. Either way, I think GPRS is a pretty bad when I need a data connection while on a call.
I tried to reflash the bootloader, radio, boot and system img's manually and nothing changed. Any ideas? Anyone else having this issue?
Thanks!

hi, I encountered same issues with tmobile LTE after I sideload to android 5.1.

cocopete5243 said:
Hello all,
Sparse poster, long time lurker. I just upgraded my Nexus 5 (purchased from Google, on T-mobile) from 5.0.1 to 5.1 using the OTA link available from AndroidCentral and though no other problems have been found, I am having some trouble with the radio now. When I'm on a call now, the data connection drops from LTE to GPRS, showing the 'G' next to the signal strength icon. Before upgrading from 5.0.1, this would drop to HSPA ('H') at worst. I came to expect that the 5.1 update would enable VoLTE since I thought the N5 was capable of this and the upgrade enabled VoLTE on the N6 for a buddy of mine. Either way, I think GPRS is a pretty bad when I need a data connection while on a call.
I tried to reflash the bootloader, radio, boot and system img's manually and nothing changed. Any ideas? Anyone else having this issue?
Thanks!
Click to expand...
Click to collapse
Tried downgrading to previous radio version?

I use kitkat radios on lollipop

I'm not having any problems with LTE. I'm on T-Mobile.
Sent from my Nexus 5 using XDA Free mobile app

My stock 5.1 radio was very broken. Phone process froze, no deepsleep, losing connection and sim, people could not call me. Very bad.
Using 5.01 radio now, its much better.
My provider is Vodafone NL.

Network Signal Issue on Z3.

Hello,
Its been 3 weeks with Z3 and i have been having serious trouble with my network provider Vodafone, Mumbai. Didnt have this issue on my previous lumia 920 or OPO.
the network just goes "no network". even if i manually locate my home n/w and apply, it goes to a never ending loop. only a reboot fixes the issue.
Happens randomly many times a day. i just upgraded to lollypop, the issue has worsened.
Any suggestions? although i didnt face with vodafone on my previous phones as stated, i had to get a new nano sim for this connection for Z3. i tried checking the sim tray.. and as you know, it sits upside down when the phone's display is facing up.. might be a connectivity issue between sim card and the contacts?

Reset to factory settings. Try this. Since you just upgraded to Lollipop, it's best to do it.

i downgraded to kitkat. i have never faced network issue (even if i get no signal, it quickly recovers when there is signal). i am running the .77 kitkat version. would like to stay on this !!

chandanbs said:
i downgraded to kitkat. i have never faced network issue (even if i get no signal, it quickly recovers when there is signal). i am running the .77 kitkat version. would like to stay on this !!
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Click to collapse
It's ok, KK is more stable, soon to be Lollipop too.