Develop Bugs

Cannot Connect to Mobile Data

Good day Gentlemen and Ladies,
So, as you the title states I cannot connect to mobile data (3g). (Before posting this I had done my research trying to find a solution and I cannot find any solutions) Let me tell you a little bit about my Galaxy Nexus SO originally when it was purchased it was a yakjuxw and I flashed to stock yakju-4.0.4 by this methodI can not link the video atm as I am a noob here) (I am sure that I did not skip any steps). I updated to android 4.2.1 all OTA updates and since that day I cannot connect to mobile data. I am pretty sure this is a software issue unless its a coincidence that my device fails on me at this point in time. Everything worked fine before i flashed it. I have tried going into *#*#4636#*#* and making sure my network type is correct as well as the radio band as automatic. I tried rebooting the device, I turned on mobile data and waited for +2hours for it to connect and nothing. I am sure I did not reach my mobile data limit as it is the beginning of my billing cycle. So, if anyone has any solutions would you be kind enough to give me a link or instructions on how to fix this problem. I recently also got double my data free of charge (from my provider) and I can't even use it Lol... Thanks!

1. Settings -> About Phone -> See your baseband? Does it exist or does it say Unknown?
2. Attempted to reset APN?
3. Tried your SIM card in another phone? Does data work on that phone?

zephiK said:
1. Settings -> About Phone -> See your baseband? Does it exist or does it say Unknown?
2. Attempted to reset APN?
3. Tried your SIM card in another phone? Does data work on that phone?
Click to expand...
Click to collapse
Man you are a genius thank you. It was an APN problem. I think when I flashed it the server # and port # went missing or something so I added those and 30 seconds later it is all working! Thanks again my friend. And for anyone who has this in the future you can access you APN settings->more...->mobile networks->Access Point Names (and APN vary on provider)

[Q] No Service. Data working but no Call/Text.

Hello!
I have m919 T-Mobile Galaxy s4 but I'm with other carrier (Wind Canada). I rooted the phone about a month ago, I believe, using THIS guide.
I spent yesterday in environment where I didn't had coverage for most of the day, but i haven't gotten it back yet. Sounds really weird as it might be not connected to the fact at all. I have 4G connection active, which means that I have internet, but it keeps 'searching' for service and I can't Call/Text anyone, neither I can receive calls or texts. Instead of the bar at the top showing how good coverage i have it just shows a crossed out circle icon.
I've tried reboots, keeping my phone off for 30mins without battery, taking out sim and putting it back in, changing network modes and resetting APN (all from settings panel).
Have anyone experienced something like that and how do I fix it? It was working perfectly for last couple of months and the phone didn't get any damage yesterday neither.
P.S Did the the regular factory reset (don't know if it affects rooting) but it didn't change anything. =

I have same problem.
Did you solve it? and how?

Haven't solved it, that was the whole point of my post!

kokozaurs said:
Haven't solved it, that was the whole point of my post!
Click to expand...
Click to collapse
Never had this happen to me. Data works off your signal, something is wickedly wrong. I'd flash the modem again if you are on 4.2.2 bootloader (doesn't matter which rom or android version). If that fails, go intonrecovery, wipe cache, wipe dalvik cache, and wipe data. If that fails, backup your data and Odin flash back to 100% stock. If that fails, more than likely your /efs folder was corrupted.
Sent from my SGH-M919 using XDA Premium 4 mobile app

Please don't create multi thread on the same topic

xdapowerapps said:
Never had this happen to me. Data works off your signal, something is wickedly wrong. I'd flash the modem again if you are on 4.2.2 bootloader (doesn't matter which rom or android version). If that fails, go intonrecovery, wipe cache, wipe dalvik cache, and wipe data. If that fails, backup your data and Odin flash back to 100% stock. If that fails, more than likely your /efs folder was corrupted.
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I think I'm gonna flash it back to 100% stock, but the problem is that I'm on mac and I don't know how to flash it back. Is there any guide on how to do it from MAC platform?
Thanks!!

kokozaurs said:
I think I'm gonna flash it back to 100% stock, but the problem is that I'm on mac and I don't know how to flash it back. Is there any guide on how to do it from MAC platform?
Thanks!!
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=755265
http://forums.techdiscussion.in/sho...Heimdall-Terminal-on-Mac-OS-(Odin-Alternative)
Second one will be more helpful. Good luck! :good:

xdapowerapps said:
http://forum.xda-developers.com/showthread.php?t=755265
http://forums.techdiscussion.in/sho...Heimdall-Terminal-on-Mac-OS-(Odin-Alternative)
Second one will be more helpful. Good luck! :good:
Click to expand...
Click to collapse
Ok, so I got heimdall, and got the recovery.img from the other topic. I followed the steps that was provided in the second link, but nothing much changed, it successfully uploaded the recovery.img, then i did recovery boot with power button + home button + volume up, it did some things with a pirate android guy in the back and thats it, booted up. Not sure if I have everything back to stock or not - either way, the issue with the network hasn't been resolved!

kokozaurs said:
Haven't solved it, that was the whole point of my post!
Click to expand...
Click to collapse
Tried this?
go to settings/more networks/Mobile networks/Network operators/Search now......
It might take a minute or two, then show you some networks it finds. Select your provider and it should list some options for you.
need to see Mobile data with a check, Data roaming checked, network mode should be LTE/GSM/WCDMA(auto connect)
If you KNOW what your APN (access Point Name) is you can check if it's correctly there.
It usually is downloaded with the search for network so just try with whatever is ther for now.
Back all the way out, and power off. Take out the battery, wait like 30 seconds, replace the battery and power on again.
See if you get service and can dial out.
Aloha and Good Luck!

bobolinko said:
Tried this?
go to settings/more networks/Mobile networks/Network operators/Search now......
It might take a minute or two, then show you some networks it finds. Select your provider and it should list some options for you.
need to see Mobile data with a check, Data roaming checked, network mode should be LTE/GSM/WCDMA(auto connect)
If you KNOW what your APN (access Point Name) is you can check if it's correctly there.
It usually is downloaded with the search for network so just try with whatever is ther for now.
Back all the way out, and power off. Take out the battery, wait like 30 seconds, replace the battery and power on again.
See if you get service and can dial out.
Aloha and Good Luck!
Click to expand...
Click to collapse
yep, one of first routines i tried. No difference

kokozaurs said:
yep, one of first routines i tried. No difference
Click to expand...
Click to collapse
Ok, now you might want to call your provider and ask them to remove you from their network and reinsert you again. That procedure will often re-enable normal operation of cellular connectivity.
They will ask you to power down and remove your battery for about a minute, then power up again.
Aloha and Good Luck!

Tried it all
Well im in the same boat here.
I checked the IMEI is correct
i did a full stock MK5 install with Odin without sim inserted and with
*#2263# helps it recognizes the network on the search list (WIND)
but it wont connect (failed to connect try again)
sometimes it connects to 4G and i can use the web
but no calls or sms
i noticed i dont have LTE enabled which ill do tomorrow
i even opened my phone to check that no cables came off as it was in service for a broken screen
tried a different sim from koodo wich also acts weird it connects to data but wont make phone calls or sms
the problems began after its been UNLOCKED (sim free)
any suggestions? im willing to try anything
its been in service 4 times and still they cant figure it out...
thanks!

ph3r0c1ty said:
Well im in the same boat here.
I checked the IMEI is correct
i did a full stock MK5 install with Odin without sim inserted and with
*#2263# helps it recognizes the network on the search list (WIND)
but it wont connect (failed to connect try again)
sometimes it connects to 4G and i can use the web
but no calls or sms
i noticed i dont have LTE enabled which ill do tomorrow
i even opened my phone to check that no cables came off as it was in service for a broken screen
tried a different sim from koodo wich also acts weird it connects to data but wont make phone calls or sms
the problems began after its been UNLOCKED (sim free)
any suggestions? im willing to try anything
its been in service 4 times and still they cant figure it out...
thanks!
Click to expand...
Click to collapse
Ok I found the solution. Apparently I have bought a stolen phone. Check the imei if it hasn't been blacklisted!

[Q] Accidentally changed the freq bands via *#*#4636#*#*

Hi,
while i was messing around with the network setting via *#*#4636#*#* menu, I accidentally selected the USA bands, and it has caused me to not able to make any phone calls or even be connected to the network.
It does not allow me to change back to the default bands I was - international
Understand that this seems to be quite common mistakes across different devices.
But specifically for Desire 816, anyone can help me with this? My device is not rooted (i'd like to keep it taht way) and bought unlock.
Anyone? I'd be super grateful! Panicking like crazy right now...

lushtea said:
Hi,
while i was messing around with the network setting via *#*#4636#*#* menu, I accidentally selected the USA bands, and it has caused me to not able to make any phone calls or even be connected to the network.
It does not allow me to change back to the default bands I was - international
Understand that this seems to be quite common mistakes across different devices.
But specifically for Desire 816, anyone can help me with this? My device is not rooted (i'd like to keep it taht way) and bought unlock.
Anyone? I'd be super grateful! Panicking like crazy right now...
Click to expand...
Click to collapse
Hey its simple and worked on mine!
Got to *#*#4636#*#*, then enable Flight mode using the Power menu, or your status bar toggle, then click Select Radio Band and you should see Automatic, now before you select it, disable flight mode. Hope it works, else in order to reset RSD settings, you need to factory reset (unless u root ofc)

tpr0 said:
Hey its simple and worked on mine!
Got to *#*#4636#*#*, then enable Flight mode using the Power menu, or your status bar toggle, then click Select Radio Band and you should see Automatic, now before you select it, disable flight mode. Hope it works, else in order to reset RSD settings, you need to factory reset (unless u root ofc)
Click to expand...
Click to collapse
Thanks for the reply!
Tried it, but the automatic option did not show up on mine
So how do you factory reset? I did reset through the phone settings already, also tried recovery, none worked...

Help
Please help me same problem i m facing i need your help.. i changed slot 1 settings in *#*#*4636#*#* three months ago then network gone.. from that day i m using my sim in slot 2 and slot 1 is not detecting network. I tried changing settings those settings again also done hard reset but not working

After flashing CM-12, Both SIM are not working. Flashed stock L firmware but still problem is there... any solution?

[Q] Network Reverting to GSM/WCDMA Only

Hi,
I bought a 2nd hand G3 from a store recently and have noticed that under network settings even if I select GSM/WCDMA/LTE as soon as I leave the menu it reverts to GSM/WCDMA only. It sometimes finds and attaches to the 4G network but prefers the HSPA network and connects to that as a priority even if 4G is in the area.
I've done a rom flash with clear option and done a factory reset but that option continues to stay set to GSM/WCDMA so wondered if somebody had changed something in the hidden menus and that I might need to change it back and what setting might need changing?
I've tried 2 official rom flashes just to make sure it wasn't a bug, they are the 10G and the 10J roms, the 10J being whats installed now.
Any ideas anyone??

Go to dial press 3845#*your phones model and then press # like 3845#*855# then go to lte only and then go to modem settings and then rat selection and then choice what you want

Tried that makes no difference. As soon as you leave the menu it still reverts back

Delete lteconfig with TB

Whats TB?

Jinxy said:
Whats TB?
Click to expand...
Click to collapse
Titanium Backup

I'm not rooted so titanium backup won't work

I have the exact same problem, after you choose GSM/WCDMA/LTE and exit the menu it goes back to GSM/WCDMA im on D855 with 10i not rooted.

Ok so it might be a software thing with the later builds? I'm on 10j at the moment and have done factory reset full reflash the lot, so thought it might be something that had previously been done in the hidden menu.
Sent from my iPad using Tapatalk

Jinxy said:
Ok so it might be a software thing with the later builds? I'm on 10j at the moment and have done factory reset full reflash the lot, so thought it might be something that had previously been done in the hidden menu.
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
I was using 10a-eur before and everything was fine im using 10i-global wich i updated with lgflashtool, so im guessing either that is the problem (eur to global) or its with the update itself.

I'd guess then it's in the update 10i/j
Sent from my iPad using Tapatalk

Jinxy said:
I'd guess then it's in the update 10i/j
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
If you do not want to root you could consider to flash it back to the v10 version that did not gave you any problems with it! But the most easy way is to root it using purpledrake and then install titanium backup and delete the lteconfig!
http://forum.xda-developers.com/lg-g3/development/root-root-lg-g3-easily-purpledrake-lite-t2821000

vak20 said:
If you do not want to root you could consider to flash it back to the v10 version that did not gave you any problems with it! But the most easy way is to root it using purpledrake and then install titanium backup and delete the lteconfig!
http://forum.xda-developers.com/lg-g3/development/root-root-lg-g3-easily-purpledrake-lite-t2821000
Click to expand...
Click to collapse
So i rooted my phone and did all that it seems to be working now but if i want to remove root i have to reinstall the kdz wich means it will go back to not working again right?
edit: just tested myself root gone and it goes back to not staying on LTE damm bug -.-

I rooted, removed the lte file and flashed it and had the same problem, so I downloaded the 10h kdz again and it fixed it, so the 10g and 10j files I had must contain the duff lte file
Sent from my iPad using Tapatalk

Jinxy said:
I rooted, removed the lte file and flashed it and had the same problem, so I downloaded the 10h kdz again and it fixed it, so the 10g and 10j files I had must contain the duff lte file
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
I have the 10i version, guess im downloading the H to give it a go.

Jinxy said:
I rooted, removed the lte file and flashed it and had the same problem, so I downloaded the 10h kdz again and it fixed it, so the 10g and 10j files I had must contain the duff lte file
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
I agree with you! I flashed few days ago the10j files and I noticed that 2G/3G/4G was missing. Today I decided to reflash the D85510H_00. This .kdz files are suitable for my IMEI. I downladed from http://lg-firmware-rom.com/. Now 2G/3G/4G is active. I think that will help!

For those who aren't rooted, try NOT going into the "Mobile Networks" menu to switch to "GSM/WCDMA/LTE".
Try this instead.
-Go into dialer and dial in 3845#*855#
-Select "LTE-Only" and go into "Modem Settings"
-select "RAT Selection" and select "GSM / WCDMA /LTE auto"
See if this helps you retain LTE. If it does, do NOT go into "Mobile Networks" or switch to "2G only" because I have that it disables my LTE when I do that.

O29C said:
For those who aren't rooted, try NOT going into the "Mobile Networks" menu to switch to "GSM/WCDMA/LTE".
Try this instead.
-Go into dialer and dial in 3845#*855#
-Select "LTE-Only" and go into "Modem Settings"
-select "RAT Selection" and select "GSM / WCDMA /LTE auto"
See if this helps you retain LTE. If it does, do NOT go into "Mobile Networks" or switch to "2G only" because I have that it disables my LTE when I do that.
Click to expand...
Click to collapse
I tried that, it goes into 4g sometimes but it preferes 3g/2g conections for some reason, switched to 10h eur and it shows on the network menu lte enabled and it works fine.

"LTE !"

Hey all, hope you are having a good weekend.
the problem that I am having is that my phone is showing that it's detecting LTE data, but nothing will load with it because most of the time the icon indicates "LTE !" This problem started about a week ago and I'm unsure if this is a carrier data network issue or something to do with my phone. I am running cm13 and here are a few of the things I have tried:
-factory reset data
-restore to backup of a time when my phone worked properly
-advanced wipe data, system, cache, etc. everything except internal and external storage
-do the previous but install the latest version of cm available with gapps
none of these attempts successful. anyone dealt with this before? any input appreciated

dpowers2 said:
Hey all, hope you are having a good weekend.
the problem that I am having is that my phone is showing that it's detecting LTE data, but nothing will load with it because most of the time the icon indicates "LTE !" This problem started about a week ago and I'm unsure if this is a carrier data network issue or something to do with my phone. I am running cm13 and here are a few of the things I have tried:
-factory reset data
-restore to two backup of a time when my phone worked properly
-advance wipe data, system, cache, etc. everything except internal and external storage
-do the previous but install the latest version of cm available with gapps
none of these attempts successful. anyone dealt with this before? any input appreciated
Click to expand...
Click to collapse
also forgot to mention that I checked the APN data settings and made sure those were all correct

dpowers2 said:
also forgot to mention that I checked the APN data settings and made sure those were all correct
Click to expand...
Click to collapse
There is an option somewhere in settings to enable only LTE or 4g. Did you set it to 4g/LTE only to see what happens ?

Dnfmind said:
There is an option somewhere in settings to enable only LTE or 4g. Did you set it to 4g/LTE only to see what happens ?
Click to expand...
Click to collapse
Yeah it was already set to Lte only. I also tried switching it to 3g and then back to Lte only to see if that would make a difference. another thing i tried was taking out the sim card and re inserting it

dpowers2 said:
Yeah it was already set to Lte only. I also tried switching it to 3g and then back to Lte only to see if that would make a difference. another thing i tried was taking out the sim card and re inserting it
Click to expand...
Click to collapse
Okay so if it's not the network ...then it could be the modem image itself. Did you come from stock or an another custom ROM to cm 13 ?.
---------- Post added at 05:25 AM ---------- Previous post was at 05:25 AM ----------
dpowers2 said:
Yeah it was already set to Lte only. I also tried switching it to 3g and then back to Lte only to see if that would make a difference. another thing i tried was taking out the sim card and re inserting it
Click to expand...
Click to collapse
I'd also check cm known issues

I came from the stock Asus rom. didn't see anything on the known issues page

anyone else have any idea? I'm still dealing with this issue as

Fix
dpowers2 said:
anyone else have any idea? I'm still dealing with this issue as
Click to expand...
Click to collapse
Just turn on and of AirPlane Mode. Then it'll work fine. Just a DNS bug or something. Not really a bug deal.
*(T-Mobile Houston area)