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AT&T Tab will no longer connect to AT&T data

I bought an AT&T Galaxy Tab. I confirmed when I received it, data worked, and then discontinued my service.
In the meantime I flashed to Overcome ROM, flashed to JPD to enable phone calls, brought it to Canada and used it there with a Canadian GSM provider, and now am trying to reconnect my AT&T service.
I activated my AT&T service about an hour ago, and everything seemed to be fine. I received the welcome to AT&T text message. However, it just won't connect to any data of any sort.
I've reflashed the modem to JPA, which I've seen people say works on AT&T, without any change.
I've installed the AT&T data usage widget, and it says "No Network Available or SIM could not be verified".
My APN settings by default were set with everything normal except for an empty password compared to what I found online. I tried setting a password and no effect.
Under Settings => About device => Status it shows Mobile network state as either Disconnected or Connecting.
Settings => Wireless and network => Mobile networks => Use packet data is unchecked, and whenever I try and change it, it will change to "Turning on..." and then after a few seconds it will change back to unchecked.
All of the Samsung related data connection toggles like on the pull-down windowshade or on the long press of power act like they're changing something instantly, but have no effect.
Anyone have any ideas on what's gone wrong here?

Someone stated earlier that their tab was kicked off of the network as well. I would try a series of restarts to see if the problem persists. If it does, try contacting at&t directly.
I Haz 3D!

knowledge561 said:
Someone stated earlier that their tab was kicked off of the network as well. I would try a series of restarts to see if the problem persists. If it does, try contacting at&t directly.
I Haz 3D!
Click to expand...
Click to collapse
I've restarted it about a million times in the past hour. I'll give contacting AT&T a try, hopefully it won't come up that I'm missing something from the stock ROM.

Called AT&T, they knew absolutely nothing, and couldn't help at all.
I suppose I'll try flashing a few more modems, including stock, and then I suppose I might have to reflash to completely stock if that doesn't fix it.

Try the sim card in another phone. They might not have apportioned it correctly.
Any modem will get you at least voice and EDGE, so don't worry about that now.
I have wap.cingular apn for a voice and data plan.

rangercaptain said:
Try the sim card in another phone. They might not have apportioned it correctly.
Any modem will get you at least voice and EDGE, so don't worry about that now.
I have wap.cingular apn for a voice and data plan.
Click to expand...
Click to collapse
Hmm I'll see if I can dig something up. However, I'm a little unclear on what will happen because this is the $15 AT&T Tablet data plan, and at best I might be able to scrounge up a phone.
The sim card automatically entered wap.cingular apn on my tablet plan as well.

I was soo excited when I found this thread. This is clearly my situation exactly:
http://forum.xda-developers.com/archive/index.php/t-1083173.html
I was using the voice APN on a data plan. I deleted all the old APNs, created a new one that is just Broadband/Broadband for name/APN. Rebooted.
Hit connect, and.....it's still screwed up. Now it flickers back and forth on the status page between Connecting and Connected, and the status bar up top reflects the same - I'll see the H with arrows for a half second, and then it'll disappear again.
On the Mobile networks page, Use packet data now similarly flickers between checked on its own and unchecked and gray.

Okay, no idea why, but everything works now.
After Broadband failed to work, I tried changing it to APN Broadband. That didn't work either, so I changed it back to Broadband. Things then started semi-working in that the connection was still flickering on and off, but when it was on, data was actually being transferred.
I rebooted, and now it's fully working. Hope it stays that way. Seems to shift back and forth between H and 3G a lot considering I'm in the middle of a city with full bars not moving, but other than that, all seems well.

It would have been good to know about 1,000 word ago you only have the $15 broadband sim!
Apn is: ATT BROADBAND, and nothing else.

rangercaptain said:
It would have been good to know about 1,000 word ago you only have the $15 broadband sim!
Apn is: ATT BROADBAND, and nothing else.
Click to expand...
Click to collapse
Hmm I have it set as Broadband, not ATT BROADBAND, and it's working for now so I ain't touch it.
Are people able to activate an AT&T Galaxy Tab on anything but the broadband sims?

Yes, I have voice and 3g data by ising a sim from my old android phone.

[Q] T-Mobile N6 on Verizon - LTE not working

Hey guys,
I bought a Nexus 6 two months ago while I was on T-Mobile. I got fed up with T-Mobile service (constantly dropping calls, not receiving all text messages, etc) and decided to switch to Verizon. I took my phone to Verizon last night, they scanned it and gave me a nano SIM. I was surprised how easy it was, given the headaches others have seemed to endure trying to get a Verizon SIM. Everything seemed to work on Verizon's end, according to the person who helped me.
The problem is, I can't get LTE to work with voice/text. If I go to Settings -> More -> Cellular Networks -> Preferred Network Type, I have 3 options to choose from: Global, LTE/CDMA, LTE/GSM/UMTS. If I select LTE/GSM/UMTS, I get LTE data, but I can't send/receive calls or texts. If I select Global or LTE/CDMA, I can send/receive calls and texts but I only get 3g data. If I go to Phone Info (*#*#4636#*#*) and set network type to LTE Only, the same thing happens...LTE data only, but no calls/texts.
This is about the limit of my ability to troubleshoot problems. What am I missing?
Thanks in advance for any help you can provide!

Did you properly configure the APN settings for Verizon? Your problem may be with that. Do a Google search for Verizon APN settings for Nexus 6...your answer may lie there.

most people have to factory reset their phones when going from another carrier to verizon, to get lte to work properly.

tankyard said:
Did you properly configure the APN settings for Verizon? Your problem may be with that. Do a Google search for Verizon APN settings for Nexus 6...your answer may lie there.
Click to expand...
Click to collapse
There were about 50 APNs when I checked. I deleted all of them and created a new one based on the following:
Name: Verizon
APN: vzwinternet
MMSC: mms.vtext.com/servlets/mms (with http, but won't let me post when typed out)
MMS port: 80
APN type: default,supl,mms
Everything else was left default. Restarted my phone. I am still only getting 3g on Global and LTE/CDMA, still can't make calls with LTE/GSM/UMTS.
simms22 said:
most people have to factory reset their phones when going from another carrier to verizon, to get lte to work properly.
Click to expand...
Click to collapse
I did a factory data reset this morning.

There are at least 5 - and as much as 10 - APN setting setups for Verizon. You may have to try them all. I put a Verizon Sim in my N6 and they all showed up in the list of APNs. When you deleted them you may have deleted the one most compatible with the N6. You may have to reset, put back in the Verizon Sim, and hope they all repopulate the APN section. If not, you'll have to search for them all and try each setup.

I can reset the default APNs and they will all show up again...without having to factory reset.
Do I need to reset the phone without the Verizon SIM inserted? I left the SIM inside when I reset this morning. I only ask because you mentioned resetting the phone and then re-inserting the Verizon SIM.
Thanks for your help.

I generally remove Sims and SD cards (not applicable here) when doing a reset as my line of precaution. Since you are able to restore the default APNs, do so, and try each one till you get the proper one.

Tmobile has their own software version/radio pushed out to Nexus 6's. You can try loading the Verizon software version/radio and see if it works.
Try this one: http://www.randomphantasmagoria.com/firmware/nexus-6/shamu/vzw/

tankyard said:
I generally remove Sims and SD cards (not applicable here) when doing a reset as my line of precaution. Since you are able to restore the default APNs, do so, and try each one till you get the proper one.
Click to expand...
Click to collapse
I found the problem. When the Verizon rep installed the sim, she immediately dialed *228. After googling LTE problems, I've found out that *228 on a LTE phone is a very bad thing. I got a new SIM and everything is now working.
Thanks again!

StickR6 said:
I found the problem. When the Verizon rep installed the sim, she immediately dialed *228. After googling LTE problems, I've found out that *228 on a LTE phone is a very bad thing. I got a new SIM and everything is now working.
Thanks again!
Click to expand...
Click to collapse
Dam shame that a rep didn't know better
Sent from my Nexus 6 using Tapatalk

[HOW TO] Fix LTE Issue with CM 12.1 based ROMs and Sprint as your carrier

This may fix jfltespr on the Sprint network always worked fine with LTE on most ROMs, but not with very many ROMs lately.
It seems that the APN had one slight difference between ROMs that worked with LTE for me (older CM, stock TW, GPE), and ROMs that had no LTE or eventually dropped LTE (CM12.1 based). The bearer was not set to LTE in the APN profile for the ROMs that do not work for me. Changing that quickly fixed the problem (figuring it out took me much longer). I looked around a bunch when I had this issue, and found people with the same issue, but no solutions. So, that's why I post this here now. Here's the How To if needed:
Go to Settings, Mobile Networks, Access Point Names, and Sprint LTE internet.
Scroll down to Bearer and see what it is set to. Mine was Unspecified, and that's what was causing the issue. Set Bearer to LTE
Go back to APNs, and also set Bearer to LTE on Sprint EHRPD internet. I know that's not the normally selected APN, but if you only change Sprint LTE Internet, it seems to automatically change to this EHRPD one, and it still doesn't work.
That's it for now. Enjoy your LTE again on 5.1.1. It seems to be much smoother.

I'm on an LG G3 but this APN/LTE issue seems to be affecting a lot of people on Android 5.1.x. I've been searching for solutions for days. Unfortunately, I have to report that your method did not work for me. With the Bearers changed to LTE I'm not getting any connection at all, but with them Unspecified I'll get a connection for a small time (<1min) after switching preferred network from 3G back to LTE before it drops again and gives me the exclamation point. If I leave it on 3G I have no problems retaining a 3G data connection. Nexus owners appear to be having this issue en masse with their 5.1.0 & 5.1.1 updates from google so it doesn't appear to be a CM issue, though CM had some APN related commits on July 1 that also seemed to cause problems for people and were undone by devs of some CM-based roms.

Yea that's a bummer. Thanks for sharing though. Maybe having it happen to so many people means that it will get fixed sooner than later, but I can only hope. I can only speak for the Sprint version of the S4 running on the Sprint network. It seems that people with this exact phone are okay on other networks.
This fix wasn't 100% for me either. Every once in-a-while, I think mostly in particular locations, it'll get stuck on the exclamation mark, and I'll just have to throw it into airplane mode for a moment.
If you haven't tried yet, make sure to put the bearers to LTE for all APNs that have the same DNS name as the normal one that you use, and the others at their defaults. It's probably not the case, but your results sound similar to mine when I only set one of the APN bearers to LTE. I thought that might be worth a mention, but I'm sure there are deeper problems. Sounds like you probably already did that anyway...

I've been having problems with this too and I tried your method but it didn't help me. It's really frustrating when there's so many great roms that are useless but thanks for trying though. Hopefully it gets resolved soon.

AOSP automatically selects the correct APN as long as the bearer is unspecified. You can hard code the bearer, but then that APN is only valid for that bearer. In other words, setting the eHRPD bearer to LTE will make that APN only valid for situations where the radio is connected to LTE. However, the connection will fail because the APN settings are wrong and the system will automatically move to the next APN with the bearer set to LTE. This time the connection will succeed because the next APN is the LTE APN. If you set the eHRPD bearer to LTE then you will never get a 3g connection.
What exactly are the symptoms you guys are seeing with LTE? My wife and I are both running CM with no connection problems whatsoever.

manardj1 said:
AOSP automatically selects the correct APN as long as the bearer is unspecified. You can hard code the bearer, but then that APN is only valid for that bearer. In other words, setting the eHRPD bearer to LTE will make that APN only valid for situations where the radio is connected to LTE. However, the connection will fail because the APN settings are wrong and the system will automatically move to the next APN with the bearer set to LTE. This time the connection will succeed because the next APN is the LTE APN. If you set the eHRPD bearer to LTE then you will never get a 3g connection.
What exactly are the symptoms you guys are seeing with LTE? My wife and I are both running CM with no connection problems whatsoever.
Click to expand...
Click to collapse
For me, I just randomly lose data connection, both 3G and LTE. It will then reconnect a few minutes later. I tried removing the other APN like the freedompop & ting leaving only sprint APNs thinking that might help but it I still lose data.

Irule305 said:
For me, I just randomly lose data connection, both 3G and LTE. It will then reconnect a few minutes later. I tried removing the other APN like the freedompop & ting leaving only sprint APNs thinking that might help but it I still lose data.
Click to expand...
Click to collapse
Do you get an explanation point?
Take a modem log right after you lose data and send it to me in a PM.

manardj1 said:
Do you get an explanation point?
Take a modem log right after you lose data and send it to me in a PM.
Click to expand...
Click to collapse
Yes, I get the exclamation point. I'm not on the CM right now because of the data issue but I'll flash it later tonight and post the log.

Irule305 said:
Yes, I get the exclamation point. I'm not on the CM right now because of the data issue but I'll flash it later tonight and post the log.
Click to expand...
Click to collapse
OK, cool. Don't post it here, it can have some private stuff in it like IMEI. PM it to me.

MMS ???
Hi. I am running CM12.1 and have tried other Lollipop roms. I am using Ting as my provider. I have two issues.
1. I don't get voicemail notifications. I can live with that.
2. Picture messages don't show. Texts come and go with no problem, just not picture (mms) texts.
Would these fixes help my issue? I have had no issues with 3g, which is most of my coverage area. I am usually on wifi anyway.
Thank you!

beezerhale said:
Hi. I am running CM12.1 and have tried other Lollipop roms. I am using Ting as my provider. I have two issues.
1. I don't get voicemail notifications. I can live with that.
2. Picture messages don't show. Texts come and go with no problem, just not picture (mms) texts.
Would these fixes help my issue? I have had no issues with 3g, which is most of my coverage area. I am usually on wifi anyway.
Thank you!
Click to expand...
Click to collapse
Cm12.1 ignores the voicemail notification from the carrier. The MMS issue is an incorrect/missing APN. If you can figure out what it should be we can get a patch submitted.

manardj1 said:
Cm12.1 ignores the voicemail notification from the carrier. The MMS issue is an incorrect/missing APN. If you can figure out what it should be we can get a patch submitted.
Click to expand...
Click to collapse
OK, it appears my data is not working, as well.
Is this what you need for a patch?
https://help.ting.com/hc/en-us/articles/205428698-GSM-Android-APN-Settings

beezerhale said:
Hi. I am running CM12.1 and have tried other Lollipop roms. I am using Ting as my provider. I have two issues.
1. I don't get voicemail notifications. I can live with that.
2. Picture messages don't show. Texts come and go with no problem, just not picture (mms) texts.
Would these fixes help my issue? I have had no issues with 3g, which is most of my coverage area. I am usually on wifi anyway.
Thank you!
Click to expand...
Click to collapse
beezerhale said:
OK, it appears my data is not working, as well.
Is this what you need for a patch?
https://help.ting.com/hc/en-us/articles/205428698-GSM-Android-APN-Settings
Click to expand...
Click to collapse
Here is a jfltespr build that fixes Ting data/MMS. I strongly recommend a clean install. If that's not possible, be sure to reset APNs to defaults after you flash and then reboot. It will take a minute or two to get data after the reboot. Please let me know how it goes. If this does fix it, I will submit the patch. If not, I still have some ideas.
Be sure to make a nandroid backup as I couldn't get my wife's S4 to test it with and this was the first time I have built for the S4 on this machine.
https://www.androidfilehost.com/?fid=24052804347780285
This build is up to date with CM sources as of last night.

I am downloading now and will try it tonight. I appreciate the quick work. I am on Octo now, but really prefer CM. I will clean install. Thank you!
manardj1 said:
Here is a jfltespr build that fixes Ting data/MMS. I strongly recommend a clean install. If that's not possible, be sure to reset APNs to defaults after you flash and then reboot. It will take a minute or two to get data after the reboot. Please let me know how it goes. If this does fix it, I will submit the patch. If not, I still have some ideas.
Be sure to make a nandroid backup as I couldn't get my wife's S4 to test it with and this was the first time I have built for the S4 on this machine.
https://www.androidfilehost.com/?fid=24052804347780285
This build is up to date with CM sources as of last night.
Click to expand...
Click to collapse

manardj1 said:
Here is a jfltespr build that fixes Ting data/MMS. I strongly recommend a clean install. If that's not possible, be sure to reset APNs to defaults after you flash and then reboot. It will take a minute or two to get data after the reboot. Please let me know how it goes. If this does fix it, I will submit the patch. If not, I still have some ideas.
Be sure to make a nandroid backup as I couldn't get my wife's S4 to test it with and this was the first time I have built for the S4 on this machine.
https://www.androidfilehost.com/?fid=24052804347780285
This build is up to date with CM sources as of last night.
Click to expand...
Click to collapse
I loaded it on and everything works except for mms. My 3g is good, wifi, texts, internet, calls ... just no pictures in texts. Something I noticed was different from the other CM12 versions is that now I can see that the text was sent, I just can't download it. I tried these settings from this page - I used the EHRPD settings. They were able to make mms work using the Octo rom.
https://help.ting.com/hc/communitie...-not-triband-update-to-Lollipop-?locale=en-us

beezerhale said:
I loaded it on and everything works except for mms. My 3g is good, wifi, texts, internet, calls ... just no pictures in texts. Something I noticed was different from the other CM12 versions is that now I can see that the text was sent, I just can't download it. I tried these settings from this page - I used the EHRPD settings. They were able to make mms work using the Octo rom.
https://help.ting.com/hc/communitie...-not-triband-update-to-Lollipop-?locale=en-us
Click to expand...
Click to collapse
MMS still doesn't work...no problem. I'll look at this link, make some more changes, and get back to you. A log might be helpful if you can.

manardj1 said:
AOSP automatically selects the correct APN as long as the bearer is unspecified. You can hard code the bearer, but then that APN is only valid for that bearer. In other words, setting the eHRPD bearer to LTE will make that APN only valid for situations where the radio is connected to LTE. However, the connection will fail because the APN settings are wrong and the system will automatically move to the next APN with the bearer set to LTE. This time the connection will succeed because the next APN is the LTE APN. If you set the eHRPD bearer to LTE then you will never get a 3g connection.
What exactly are the symptoms you guys are seeing with LTE? My wife and I are both running CM with no connection problems whatsoever.
Click to expand...
Click to collapse
I'm running cm12.1 nightlies with Freedompop as my carrier. This fixed my problem immediately.

bestiademon said:
I'm running cm12.1 nightlies with Freedompop as my carrier. This fixed my problem immediately.
Click to expand...
Click to collapse
What fixed your problem? Setting the 3g bearer to LTE? That means the freedompop LTE APN is wrong and should be patched in the code. If we could get more input on this we could fix it for good.

I don't even have anything listed in my APN (I used to). How do I fix that?

PwnCloud said:
I don't even have anything listed in my APN (I used to). How do I fix that?
Click to expand...
Click to collapse
Tap airplane mode, then tap again to turn airplane mode off. Then go into your APN menu. Your APN's should appear.
I'm running the latest CM 12.1 nightly. The stock APN's work for me, but I rarely get a LTE connection with them.
I've flashed the APN fix that's floating around, and it worked in older builds of CM 12, but recently the fix just disconnects and leaves me with no signal.
If I do what OP suggests, I'll get an LTE connection, but that leaves me with no 3G where LTE isn't strong.
I guess the problem with CM is that it cannot successfully switch between LTE and 3G correctly.
If you're not all that concerned about getting an LTE connection, I'd recommend just sticking with the stock APN's. Once you start flashing fixes, you're gonna have a problem.

Resetting 'band' setting changed from test *#*#info#*#* menu?

The short:
I changed the "Select radio band" setting in the test menu (*#*#info#*#*) and it screwed things up.
I wiped and reflashed CM12.1 - but it didn't reset that setting (it's still borked).
Does anyone know where it stores that setting, or how to reset it somehow?
The long:
Initially in CM12.1 I was having problems staying on LTE - it always fell back to 3G and stayed there.
So tried this band change that someone who had the same problem suggested.
Now, every option I try is great for LTE but says "cellular network not available" and I can't make calls.
The exception is "Cellular" which I can make calls but only get 1X data.
These are the options in the menu:
"JAPAN Band (WCDMA-800/WCDMA-IMT-2000)"
"USA Band (GSM-850/PCS-1900/wCDMA-850/WCDMA-PCS-1900)"
"Cellular (800-MHz)"
"PCS (1900-MHz)"
I don't know what it was before and I can't see figure out how to tell what it currently is set to.
I just want to flash back to stock so things work again, but if this setting doesn't get reset then I don't know if that will work anyway.

Any chance settings like that are stored on the SIM card?

try to re-flash radio only

masterchapter said:
try to re-flash radio only
Click to expand...
Click to collapse
Worth a shot, but doesn't seem to have helped.

Try the instructions here: http://forum.xda-developers.com/showthread.php?p=57778872
I seemed to have luck when I made the changes according to this post and then immediately ran the ping test. I don't know if the ping test really did anything to help but I've had cell service since following these steps.

mh0520 said:
Try the instructions here: http://forum.xda-developers.com/showthread.php?p=57778872
I seemed to have luck when I made the changes according to this post and then immediately ran the ping test. I don't know if the ping test really did anything to help but I've had cell service since following these steps.
Click to expand...
Click to collapse
Unfortunately that's what I did initially. The setting in that link ("Cellular") made my calls work, but I could only get 1X data.
So somehow by just flashing and reflashing different things (including failing to reflash to stock), it's back to where it was when I started.... which sucks, but is at least useable. Calls work and data works, but the first time it has to drop back from LTE to 3G, it get stuck in 3G forever (until airplane mode). Super sucks since it's my primary home router tethered. I have to airplane mode like 5 times a day.

Just in case someone else ran into this problem, I ended up getting a new sim from Verizon and everything's working now finally. It still says "000000" when it's in 3G, but I don't care about that - it works and it goes back to LTE when it can, rather than staying on 3G forever.

Works for Moto X play - should work for others too..
I too did the same mistake. Changed my Band to "USA" and couldn't restore to previous despite Factory reset.
The SIM 1 went into 4G data only (No voice) , didn't recognize 2G & 3G network for any sim.
However Sim 2 worked fine for 2G,3G & 4G.
i came across a thread in XDA, and after breaking my head over how to execute it, I finally did it.
I have written a brief guide to it. Here's the link.
http://forum.xda-developers.com/moto-x-play/help/network-band-changed-to-usa-t3278614#post65991684

No hotspot on note 9 after U1 firmware flash

I was using straight talk cdma with my unlocked nexus 6p and the hotspot was working great as always, then I get a new "sprint unlocked" note 9 today, flashed it to U1 firmware to get it to work with the same sim that is in my nexus and boom everything is working as expected but I lost hotspot functionality. I can turn it on and it acts like its working but my computer never sees the network. Any Ideas? I've been out of the game for awhile and I didn't know much to start with lol. Any help is much appreciated. This phone is sick, if I just had my hotspot back I would be in business. Ran though the process again with a factory reset but no dice.

Bump. Tried a couple more things with no luck, I wonder why hotspot worked so well with the same setup on the nexus phone but just fell completely off with this one. I have heard that you could lose some carrier functionality when flashing U1 like wifi calling, visual voicemail but I never head anyone mention losing the hotspot. This is one of the few features I would have a hard time living without since I've grown so used to having it. Any suggestions or something to try?

I had this issue when I had a tmobile note 9. Changed the apn type to default,supl,mms and it worked. Not sure if that really did anything but had the exact problem you are having. Maybe manually entering the apn is an answer for you.

Had this problem again after rolling back and doing the official upgrade. In APN Type, put * and save the apn. You will likely have to put in all new APN settings for your carrier. I couldn't edit the automatic one. Once doing this, tethering worked properly!

mtalbert63 said:
Had this problem again after rolling back and doing the official upgrade. In APN Type, put * and save the apn. You will likely have to put in all new APN settings for your carrier. I couldn't edit the automatic one. Once doing this, tethering worked properly!
Click to expand...
Click to collapse
I don't have the option to add a new apn, its grey-ed out and I can't edit the automatic one.