Develop Bugs

[Q] Wifi and data connection issues with CM11-20140122

Yesterday I upgraded my Galaxy W to CM11-20140122 as per the instructions on the developer section of this site. Everything went smoothly and I connected the phone to my home wifi and update and reinstalled all my apps. No problems. Thismorning though, I'm experiencing wifi and data over network connection issues. For some reason, although I can see the wifi networks and I'm notified that there are networks available, I cannot connect to them - even though I could previously! The same thing happens with my mobile network - the network is connected and I can make calls and send texts but I persistently get 'No service' and no data connection.
If anyone has any ideas how I fix this I'd appreciate it? Is anyone else is having the same kind of issues? I was thinking of upgrading to kernel 3.4.80 to see if that solved anything...

ok, so after three hours sat within range of the wifi, suddenly the phone has decide to connect to it (as I wrote the above post - maybe its feeling threatened! ). I wonder if this is going to be persistent behavior or wether it was a 1-off.

The Same Here

ElGzzar said:
The Same Here
Click to expand...
Click to collapse
Interestingly, my wifi seems ok now, but I'm still not getting any packet-data connection. After a recent phonecall I got the message 'No Sim or Sim Error' (although it let me make the call). Then I look at the details under 'About Phone' and 'Status' I get the IMEI number, it lists my phone number as unknown and Mobile Network State as Disconnected. Interestingly, it doesn't seem to be connected to the right network either. I wonder if the packet thing is actually and issue with reading the sim-card?

fix
How did you install the rom ??
I think restarting the phone after switching to 2g fixes the issue
it only happens on wrong recovery options (dirty flash)
use this "clean to install a new rom"
in http://forum.xda-developers.com/showthread.php?t=2557019

nschurch said:
Interestingly, my wifi seems ok now, but I'm still not getting any packet-data connection. After a recent phonecall I got the message 'No Sim or Sim Error' (although it let me make the call). Then I look at the details under 'About Phone' and 'Status' I get the IMEI number, it lists my phone number as unknown and Mobile Network State as Disconnected. Interestingly, it doesn't seem to be connected to the right network either. I wonder if the packet thing is actually and issue with reading the sim-card?
Click to expand...
Click to collapse
I think this issue from the kernel ..

arruted was
theonepharaoh said:
How did you install the rom ??
I think restarting the phone after switching to 2g fixes the issue
it only happens on wrong recovery options (dirty flash)
use this "clean to install a new rom"
in http://forum.xda-developers.com/showthread.php?t=2557019
Click to expand...
Click to collapse
I followed the instructions from this thread: http://forum.xda-developers.com/showthread.php?t=2588495 to install the rom. I used Odin 4.43 to install ancora.ops, then factory reset and cache wipe, then flashed the rom, then reboot (basically). I don't think there was anything wrong with the flashing process, it all seemed to go smoothly...
How do I 'switch to 2g'? do you mean select my preferred network as 2g?

OK, so I flashed the kernal to 3.4.80 and everything went smoothly. Wireless has been behaving (and was before the update), but I am still getting 'No Service' on my mobile connection. I tried setting my preferred network connection to 2G and that hasn't helped. I can probably live with it if wifi is working, but it is a bit annoying... I guess I could try the 'clean install' link.

Have this problem on DarkCM rom too

Cannot SEND SMS Tried Everything Please HELP :(

All of a sudden today I cannot send SMS.
I was on a really old build of Cyanogenmod12 (April 22nd I believe) as any time I tried to update to newer Nightly builds I lost all Sprint service could not make/receive calls or texts, etc.
I decided I was pretty fed up with CM12 so I decided to go ahead and migrate to AICP. I wiped everything TWICE in recovery, loaded up AICP and it works fine, I get LTE signal, etc. However I cannot SEND SMS, I can RECEIVE SMS I just cannot SEND. I had done some data restores with Titanium and I figured that somehow some way that might be messing with things. So I did another 100% fresh install after wiping everything.... I can send/receive calls, receive SMS but I cannot SEND SMS
I am really at a loss here guys, ANY help would be greatly appreciated

*#*#4636*#*# change it to CDMA wait 30 seconds send an SMS and do *#*#4636*#*# again change it back to late/CDMA n should be ok
Sent from my SM-N910P using XDA Premium HD app

pbedard said:
*#*#4636*#*# change it to CDMA wait 30 seconds send an SMS and do *#*#4636*#*# again change it back to late/CDMA n should be ok
Sent from my SM-N910P using XDA Premium HD app
Click to expand...
Click to collapse
I stayed up all night last night working on this, let me update the thread with what I have done so far.
I was looking at some stockish ROMs and I noticed that there were warnings on some of them stating that you needed to have the Sprint OTA 5.0 update installed prior to flashing, which I actually never got. My phone came out of the box with Kit Kat and I never installed the 5.0 update, I went straight to CM12 5.0 instead. So I had a theory that there might possibly have been some sort of network data profile, etc or something out of that official 5.0 OTA that I never got that was somehow causing me problems. I decided to revert back to complete bone stock.
I wiped everything and flashed the N910PVPU1BOB7 file (MD5 = 7304e42cf0e241553d8db9e3c3eeed81) which was the official Sprint 5.0 OTA. Loaded it up, updated the PRL, Network Data Profile, etc, etc, etc.... everything works (relatively speaking...... TouchWiz sux balls of course). I have LTE signal, I can send/receive calls, I can send/receive SMS... all good.
So at this point I decided to re-wipe and flash AICP, with the emotion Kernel (latest builds on all). Load it up.... same problem as before. I have LTE signal (stronger than on the stock Sprint ROM), I can send/receive calls, I can receive SMS but I still CANNOT SEND SMS
I tried a few things at this point. I tried to manually reset the Sprint network connection on the phone by dialing ##72786#, this did not work, it returned an error "incorrect MIM code". I tried the *#*#4636*#*# that I have seen suggested in multiple places, this also did nothing, it returned an error "incorrect MIM code". I also noticed on the "mobile networks" tab, and this is true for BOTH CM12 and AICP, that it has the setting at "Global" by default and everything works with exception of sending SMS. Now when I click that tab it only has 3 options LTE, 3g, 2g.... for some reason "global" is not an option, neither is CDMA. Whenever I select LTE it automatically drops me from the Sprint network PERMANENTLY until the ROM is re-flashed there is no way to reverse this. I cannot even dial the manual programming codes "*#* etc" as it just simply says "no network service". If I try to automatically connect to the sprint network through the network operators tab it does in fact find Sprint as my provider, however if I click on Sprint to connect it processes for about 2-3 minutes and then simply returns an error of "cannot connect to the network at this time, please try again later". Again the only way to reverse this is to re-wipe and re-flash again which puts it into the unselectable "global" network setting by default where then I will have LTE signal, I can send/receive calls, and can receive SMS but not send SMS.
So that is where I am at, I stayed up all night last night wiping, flashing, and testing different things over and over. Nothing seems to work 100%, except the stock 5.0.1 OTA which is what I am on now. I really hate TouchWiz and for some reason I get a much weaker LTE signal on stock compared to either CM12 or AICP (I have no clue why this is). I am really at a loss here why everything works on the custom ROMs except for sending SMS..... willing to try almost anything to go back to a custom ROM.
Let me know if you guys have any other ideas.

Well great news I have finally resolved the SMS send issue
pbedard said:
*#*#4636*#*#
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Click to collapse
pbedard had tried to help me with the above post (which I appreciate, thank you), and I have seen the same advice in other threads. One slight problem though, he slightly mistyped the manual programming code it is actually *#*#4636#*#* not *#*#4636*#*# which I had tried entering ohhhhh I dont know 30 times? :silly: And it always returned an "invalid MMI code".
I had tried everything and after spending a full day on TouchWiz I was determined to fix the issue so I could go back to a custom ROM. I was even manually creating and deleting APNs, etc. Nothing would work. Right as I was about to finally give up (after literally 12hrs of researching the issue and testing fixes) I was reading the official CM 12 thread and came across the "fixes" post:
http://forum.xda-developers.com/showpost.php?p=57613217&postcount=3
Because I had tried entering the manual programming code so many times I happened to notice that the last 4 key strokes were not what I had been entering. I entered the correct programming code, boom the Phone Info menu pops right up I follow the directions and what do you know send SMS finally works .... wow what a relief, I am on the latest AICP release on the emotion Kernel and everything works like a charm.
Also by setting the phone to LTE/CDMA through the manual programming menu I have the strongest LTE signal by far, full 100% bars at all times (I live right next to a Sprint tower). I have never understood why I only got 1-2 bars on the stock ROM and 3-4bars on CM12/AICP through the default settings. Anyway thanks for help and I will list out exactly what I did to get it working.
- 100% Stock ROM
- CF Auto Root and TWRP install through Odin
- Reboot to recovery
- Wipe Dalvik cache, system , data, and cache
- Reboot to recovery
- Flash emotion kernel (optional)
- Flash latest AICP build (or custom ROM of your choice)
- Flash latest stock Gapps
- Reboot system
- Confirm Google Messenger is the default SMS app (it will already be if you flashed 5.1 stock Gapps)
- Dial *#*#4636#*#* ("Testing" menu screen will pop up, select "Phone Information")
- Scroll down to "Set preferred network type" click it and scroll up and set it to "CDMA auto (PRL)"
- Wait until 3G signal comes online (takes about 10 seconds)
- Change "preferred network type" to " LTE/CDMA auto (PRL)"
- It should take another 10 seconds for LTE signal to come online and you should be good to go to send and receive SMS ! :good:

3.35.401 firmware internet issue(Wi-Fi and data)

Since updating to mm firmware..I've used all mm roms on here with full wipe.. I constantly get internet stalling on all browsers and random Wi-Fi and data disconnects ..never encountered anything so frustrating..
For example I'll type apple in browser search it loads 5% stalls then internet disconnects and have to re search apples.. Wi-Fi icon shows disconnect and mobile data doesn't kick in..I have attempted on different Wi-Fi and it's still the same..there seems to be an internet loading/ Wi-Fi and data disconnect Issue for me on mm firmware.. anyone else experienced this phenomenon??

More info.. wind mobile Canada..believe I have att variant..which wind sells in Canada..
Slow Wi-Fi and disconnects..should hand over failing Wi-Fi..to mobile data network right??but just stalls and disconnects when loading pages..constantly..

Which rom are you on now?
Does it jump to and fro on wifi data or is it a flatout disconnect and you have to manually reconnect?
Does the data stay disconnected outside of wifi range or is that bouncing on/off too?
Sent from my HTC One M9 using Tapatalk

I'm on leedroid now but it's the same on all roms..it disconnects then auto reconnects Wi-Fi and mobile data doesn't kick in to load the page. I believe data must be disconnecting too or else it would kick in a load the page but pages only finish loading after the Wi-Fi reconnects

Leedroid. There's your problem!.
There has been known wifi issues on leedroid. I recommend flashing the rom twice and do not restore wifi settings if possible.
As for data connection you should be prompted at the setup to select your carrier which in turn selects the correct apn. You need your simcard in at this point as it uses the sim to determine the carrier settings.
Sent from my HTC One M9 using Tapatalk

Lee droid.. not the problem..does this on all roms so far as previously mentioned..except one I hAdn't tried. And will tomorrow. Arhd. My apn is set correctly.

Did you restore the settings from an app like titanium backup or the likes?
Sent from my HTC One M9 using Tapatalk

try to Flash the dev Edition Firmware twice and try it again. since you are on att you should have no Problem fashing the dev Edition, as Long as the cid is the proper one for dev edition

Seemed to have fixed it..
Mobile data--network operators-- clicked wind home network..it registered on the network again and seems to be fixed ATM..will update if not..possibly it altered somethig..thanks

Not fixed tried more roms..Wi-Fi and data keep auto disconnecting..maybe try reflashing 3.35.401 firmware? as its not a rom issue

matthewstice said:
Not fixed tried more roms..Wi-Fi and data keep auto disconnecting..maybe try reflashing 3.35.401 firmware? as its not a rom issue
Click to expand...
Click to collapse
be sure that you Flash it a second time, as the first one does not update all partitions

LG G3 4G Network Drops

So the problem I'm having with my G3 is that the Network either drops and comes back repeatedly or completely drops and does not return. This only happens on 4G. When I go into network settings and change network mode to 3G it works fine and I get a constant signal all the time.
I have been using Fulmics ROM and I thought maybe that was the issue. But it wasn't.
I tried 3 different sims from three different carriers (Three, EE, O2) on several stock firmwares. (20N, 21C, 30A, 30F).
Each scenario is the same; network drops when phone is on 4G network mode, but its fine on 3G mode.
However, I have noticed that if I leave Wifi OFF allowing 4G data to connect first, then its fine. I can even turn Wifi ON again and the network is stable. I can even turn Wifi and Data OFF and the network is still stable.
But, if I toggle aeroplane mode, where Wifi connects first or where Wifi and Data is turned OFF; I am back to the network dropping.
Also, I live in London UK so there should not be any signal issues. Can anyone tell me why this is happening. I doubt it's software issue as I've tried several firmwares.
Any help is appreciated.

Mate I'm afraid there is a high possibility it's the Fulmics ROM.. I'm still trying to read up on the issue myslef, there's a ton of reports in the Fulmics thread and around.

I'm using an UK bought LG G3 as well (from Three) and started experiencing similiar issues after I flashed Fulmics. Even tried rolling back to 4.4.2 using a .tot file but didn't really help me.
Still scouring all around trying to find how to fix the issue..

engmia said:
Mate I'm afraid there is a high possibility it's the Fulmics ROM.. I'm still trying to read up on the issue myslef, there's a ton of reports in the Fulmics thread and around.

I'm using an UK bought LG G3 as well (from Three) and started experiencing similiar issues after I flashed Fulmics. Even tried rolling back to 4.4.2 using a .tot file but didn't really help me.
Still scouring all around trying to find how to fix the issue..
Click to expand...
Click to collapse
Hmmm looking back now this issue did start when I first installed fulmics 3.5. But shouldn't everything revert back to stock when you reinstall stock firmware.

thufz9585 said:
Hmmm looking back now this issue did start when I first installed fulmics 3.5. But shouldn't everything revert back to stock when you reinstall stock firmware.
Click to expand...
Click to collapse
That's what I thought but I guess it's a little bit more tricky.
Anyways I think I managed to restore some kind of stability in the signal, still unsure about the process though. Seems that different stuff are working for different people. In a few days I hope to have some information to give you how to fix it.
In the meantime try checking the Fulmics thread for ideas and suggestions (that's where I start off from).

engmia said:
That's what I thought but I guess it's a little bit more tricky.
Anyways I think I managed to restore some kind of stability in the signal, still unsure about the process though. Seems that different stuff are working for different people. In a few days I hope to have some information to give you how to fix it.
In the meantime try checking the Fulmics thread for ideas and suggestions (that's where I start off from).
Click to expand...
Click to collapse
Yeah let me know when you find a fix. Really appreciate the help.
One thing that is sort of a temporary fix for me, works on Three, EE and O2 (only ones i tried), is connecting Data first when on 4G mode.
So if I toggle airplane mode and if Wifi connects first then the network drops or keeps refreshing.
But, if I leave Wifi OFF and Data establishes a connection; the network is stable and I can then turn Wifi On again and the network will remain stable.
I just have to make sure the network does not lose connection (i.e. tunnel or airplane mode), and if it does ensure Data connects first.
Also, another thing. After I reinstalled Fulmic 5.3 it seems 4G mode is sort of stable. As in when on 4G mode instead of dropping the network it connects via 3G automatically. But this only happens with Three.

thufz9585 said:
Yeah let me know when you find a fix. Really appreciate the help.
One thing that is sort of a temporary fix for me, works on Three, EE and O2 (only ones i tried), is connecting Data first when on 4G mode.
So if I toggle airplane mode and if Wifi connects first then the network drops or keeps refreshing.
But, if I leave Wifi OFF and Data establishes a connection; the network is stable and I can then turn Wifi On again and the network will remain stable.
I just have to make sure the network does not lose connection (i.e. tunnel or airplane mode), and if it does ensure Data connects first.
Click to expand...
Click to collapse
Okay here is what worked for me - open this guide and download the Three specifiic Lollipop and Marshmallow .kdz files.
Flash the stock Marshmallow firmware first using the LG Flash Tool method. Your phone probably won't automatically get recognized since you're running Fulmics now so you'll need to change the COM port as described in post #
After that downgrade to stock Lollipop using the LGUP method. Personally I downloaded more updated (I think, not sure) files from here.
Then I proceeded to re-root and clean install Fulmics 5.1 and the 5.2 and 5.3 OTA updates from recovery. Booted and network works without drops now with 4G connectivity.
thufz9585 said:
Also, another thing. After I reinstalled Fulmic 5.3 it seems 4G mode is sort of stable. As in when on 4G mode instead of dropping the network it connects via 3G automatically. But this only happens with Three.
Click to expand...
Click to collapse
I changed my carrier and got an automatic SMS with configuration for my phone and instructions to save it. I should've known something was fishy when I recieved the "congratulations for setting up" message even before I recieved the actual settings. Anyways 4G was running fine on my new carrier with 32 mbps speed which is okay, much better compared to the same carrier 3G network, however I only had 3 bars of connection so I gussed what the heck, I should save that configuration after all, it might make things better. What a bloody mistake. I lost 4G connectivity and my phone refused to connect to the 4G network, only 3G (just as you describe).
What worked for me in this scenario was wiping the cache and dalvik (not really sure this step is even necessary to be honest, but I was headed for a full rom re-wipe anyway and decided to try with this first), going into the hidden menu and choosing LTE only connectivity (Fulmics Tweaks -> Hidden Menu [or the hidden code for the phone app if you decided to stay on stock, which I dont have] -> Modem Protocol -> RAT Selection -> LTE only. At this step my phone got to the usual 3 to 4 bars of connectiviy but was displaying "Emergency mode only" and no data at all. I proceeded to Settings -> Networks -> More -> Mobile Networks -> Access point names -> Reset to default from the menu. If network mode doesn't change back to GSM/WCDMA/LTE auto automatically, change it back manually. At this point I had restored back my 4G connection and everything is working normally (30-32 mbps connection stationary in my house through a wifi hotspot next to my laptop).
Good luck, I would follow the steps as described just in case. I tried many reflashes before that should've worked but didn't for me. However different things work for different people, hope this works for you and please report back

engmia said:
Okay here is what worked for me - open this guide and download the Three specifiic Lollipop and Marshmallow .kdz files.
Flash the stock Marshmallow firmware first using the LG Flash Tool method. Your phone probably won't automatically get recognized since you're running Fulmics now so you'll need to change the COM port as described in post #
After that downgrade to stock Lollipop using the LGUP method. Personally I downloaded more updated (I think, not sure) files from here.
Then I proceeded to re-root and clean install Fulmics 5.1 and the 5.2 and 5.3 OTA updates from recovery. Booted and network works without drops now with 4G connectivity.
Click to expand...
Click to collapse
I'd like to thank you so much for this information! I was having signal drop issue after installing Fulmics ROM. Tried to flash stock ROM but no success. After doing the downgrade via LGUP method to LP my phone is getting full signal again (at least I didn't notice any drop until now).
Thank you!

waltertakashi said:
I'd like to thank you so much for this information! I was having signal drop issue after installing Fulmics ROM. Tried to flash stock ROM but no success. After doing the downgrade via LGUP method to LP my phone is getting full signal again (at least I didn't notice any drop until now).
Thank you!
Click to expand...
Click to collapse
Glad I could be of help!

engmia said:
Okay here is what worked for me - open this guide and download the Three specifiic Lollipop and Marshmallow .kdz files.
Flash the stock Marshmallow firmware first using the LG Flash Tool method. Your phone probably won't automatically get recognized since you're running Fulmics now so you'll need to change the COM port as described in post #
After that downgrade to stock Lollipop using the LGUP method. Personally I downloaded more updated (I think, not sure) files from here.
Then I proceeded to re-root and clean install Fulmics 5.1 and the 5.2 and 5.3 OTA updates from recovery. Booted and network works without drops now with 4G connectivity.
Click to expand...
Click to collapse
Sorry for the late reply.
I followed your instructions and unfortunately it didn't work. :crying:
I first tried with the D85520f you provided and then with an updated D85521C firmware. But nothing worked.
The temporary fix, which I found works, is to ensure 4G mobile data establishes a connection first before Wifi (turn Wifi OFF then ON after data established). Then there is no signal drop until I go through a tunnel or phone restarts (signal drops completely), which means again i have to ensure 4G mobile data establishes a connection before Wifi or else it'll go back to the constant signal dropping.
Guess I'll just stick with 3G at all times. I've spent too much time trying to correct this than actually finding enjoyment in using the phone.
Anyway really appreciate the time and effort you took to help with this annoying situation. :good::good::good:

thufz9585 said:
Sorry for the late reply.
I followed your instructions and unfortunately it didn't work. :crying:
I first tried with the D85520f you provided and then with an updated D85521C firmware. But nothing worked.
The temporary fix, which I found works, is to ensure 4G mobile data establishes a connection first before Wifi (turn Wifi OFF then ON after data established). Then there is no signal drop until I go through a tunnel or phone restarts (signal drops completely), which means again i have to ensure 4G mobile data establishes a connection before Wifi or else it'll go back to the constant signal dropping.
Guess I'll just stick with 3G at all times. I've spent too much time trying to correct this than actually finding enjoyment in using the phone.
Anyway really appreciate the time and effort you took to help with this annoying situation. :good::good::good:
Click to expand...
Click to collapse
Modem 21C should be your answer! Please try with that.

Is anyone still out there
engmia said:
Modem 21C should be your answer! Please try with that.
Click to expand...
Click to collapse
I flashed dummies and get dropped 4g data like this.
I have tot back to stock and didn't help... not Kdz
Haven't downgraded yet to LP yet.
On turborom now.
Can I just flash this modem? Have a link to the 21c modem?
Flash in twrp or send via LG flash?

Mobile data not working after turn on/off airplane mode

Hi,
I am using hydrogen 32GB
latest Xiaomi Original Developer ROM(MIUI 8 Global 6.11.10)
The problem is after turn on and off airplane mode, mobile data connection dose not working.
After rebooting my phone, mobile data connection is normally work again.
<Summery>
[Booted]
mobile data connection ON
internet OK
status bar "4G"
[Turned ON Airplane mode]
mobile data connection OFF
internet NG
status bar "Airplane logo"
[Turned OFF Airplane mode]
mobile data connection ON
internet NG
status bar "3G"
!!!! This is problem !!!!
It should be like this.
mobile data connection ON
internet OK
status bar "4G"

Anybody know the solution....??
I am very confusing what I should do...

I don't have a solution... Not a miui fan actually but the dev rom is not a good choice when it comes to bugs IMO.

thanks
i will change rom to original

Hi, just want to inform you i think that my wife's phone problems (no mobile data) is the same as yours. I installed a xiaomi.eu rom to her phone a couple of weeks ago and doesnt updated since that.
Than i saw this on xiaomi.eu's changelog:
Phone
Fix - Modem crashes in LTE networks (11-10)
Hope it helps.

lukacsp said:
Hi, just want to inform you i think that my wife's phone problems (no mobile data) is the same as yours. I installed a xiaomi.eu rom to her phone a couple of weeks ago and doesnt updated since that.
Than i saw this on xiaomi.eu's changelog:
Phone
Fix - Modem crashes in LTE networks (11-10)
Hope it helps.
Click to expand...
Click to collapse
Ok just tested and confirmed that the latest xiaomi.eu rom (based on developer version i think) from 2016.11.17 is still buggy
I just ****ed up 4 hours because upgrade from 2016.11.03 to 2016.11.17 ended in a big black boot with 900E, i lost twrp also and wast able to run it after re-flash it back so i had to flash the entire phone with miflash with a fastboot rom. It wasnt unlocked, maybe thats was the reason but damn why always have to learn such things in the hard way???