[Q]Unlocked T-Mobile Galaxy Note 2 on AT&T - T-Mobile Samsung Galaxy Note II

I looked everywhere and cannot even come up a guess to my issue. I have an unlocked T-Mobile Galaxy Note 2, but switched carriers to AT&T and now having weird issues with the phone. I changed the APN settings, but I still get network drops during phone calls and syncing issues with phone numbers.
The phone will randomly drop a call and not be able to call back for about 5 minutes. I am not a noob and I can usually troubleshoot my own issues. Oh yeah, the phone was working fine on T-Mobile and only started the issues when I put a fresh AT&T sim card in it. It doesn't happen all the time either. I could go a week no problem, then three or four days with issues.
Any suggestions on what I should do?
Thanks a ton

lunchmeat78 said:
I looked everywhere and cannot even come up a guess to my issue. I have an unlocked T-Mobile Galaxy Note 2, but switched carriers to AT&T and now having weird issues with the phone. I changed the APN settings, but I still get network drops during phone calls and syncing issues with phone numbers.
The phone will randomly drop a call and not be able to call back for about 5 minutes. I am not a noob and I can usually troubleshoot my own issues. Oh yeah, the phone was working fine on T-Mobile and only started the issues when I put a fresh AT&T sim card in it. It doesn't happen all the time either. I could go a week no problem, then three or four days with issues.
Any suggestions on what I should do?
Thanks a ton
Click to expand...
Click to collapse
I have two TMobile Note 2s that work just fine on ATT. No dropped calls and data works fine. LTE reception seems a little lacking but other than that it's fine.

Try a new SIM.
How long have you been on AT&T? Post paid or a MVNO?

kozmo21 said:
Try a new SIM.
How long have you been on AT&T? Post paid or a MVNO?
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Click to collapse
It's actually my sister who has the phone now. I was using it on T-mobile with no issues. I gave it to her, then it started having these problems. Goes to and she gets a brand new at&t sim, still doesn't fix the issues.

Related

Learnt something about Canadian LTE from a buddy who works for a carrier here

So I was enjoying a cigar with a buddy who is a field tech for a Canadian carrier (not mine rogers, but another one) when we got on the topic of a samsung tablet work issued him.
He said he uses it to troubleshoot LTE issues they've been having.
Basicly the device loses LTE and either goes into "no service" or get's stuck in HSPA+.
I freaked because i've noticed the same issue, but thought it was related to CM10 running on my phone.
Apparently they discovered it has to do with they're infrastructure. The phone loses LTE, tries to re-negotiate,gets rejected, and stops trying.
They're work around is to get firmware updates to get the devices (he didn't mention which ones) to re-negotiate a second (or third time) where it almost always goes through.
I just reboot or bounce air plane mode and it often works.
Just figured people might find that interesting.
stavrosg said:
So I was enjoying a cigar with a buddy who is a field tech for a Canadian carrier (not mine rogers, but another one) when we got on the topic of a samsung tablet work issued him.
He said he uses it to troubleshoot LTE issues they've been having.
Basicly the device loses LTE and either goes into "no service" or get's stuck in HSPA+.
I freaked because i've noticed the same issue, but thought it was related to CM10 running on my phone.
Apparently they discovered it has to do with they're infrastructure. The phone loses LTE, tries to re-negotiate,gets rejected, and stops trying.
They're work around is to get firmware updates to get the devices (he didn't mention which ones) to re-negotiate a second (or third time) where it almost always goes through.
I just reboot or bounce air plane mode and it often works.
Just figured people might find that interesting.
Click to expand...
Click to collapse
Bell has had the same issue (for a while), I haven't received any calls about it recently but also didn't receive an email about it being resolved but it appears so. Our temporary resolution for it was to just keep it at H+ for the time being
Found where I posted about it here
I'm on fido with a rogers phone and I have never lost LTE
Sent from my SGH-I747M using XDA Premium HD app
stavrosg said:
So I was enjoying a cigar with a buddy who is a field tech for a Canadian carrier (not mine rogers, but another one) when we got on the topic of a samsung tablet work issued him.
He said he uses it to troubleshoot LTE issues they've been having.
Basicly the device loses LTE and either goes into "no service" or get's stuck in HSPA+.
I freaked because i've noticed the same issue, but thought it was related to CM10 running on my phone.
Apparently they discovered it has to do with they're infrastructure. The phone loses LTE, tries to re-negotiate,gets rejected, and stops trying.
They're work around is to get firmware updates to get the devices (he didn't mention which ones) to re-negotiate a second (or third time) where it almost always goes through.
I just reboot or bounce air plane mode and it often works.
Just figured people might find that interesting.
Click to expand...
Click to collapse
When I bought my S3 at the Bell store here in Québec city a few weeks ago, the salesmen insisted on NOT giving me a LTE sim card.
What he told me conquers with what you are describing.
I accepted is suggestion and got a H+ micro sim.
Since then, I returned to the store to get a LTE sim card and I did encounter the issue once or twice.
I am now forcing my phone to remain on H+ at best via Settings > Wireless & networks > Mobile networks > Network mode.
In the greater HRM (Halifax/Dartmouth/Bedford) we have a pretty good LTE footprint according to the Rogers website, but my S3 is constantly reconnecting. I can tell because every time it drops LTE, my visual voicemail app will notify that it has no service.
I turned LTE off because it was just hammering my battery. I could barely make it through a 10 hour work day with little to no usage if I leave LTE on, and I'm supposedly in the middle of the service area.
trendiggity said:
In the greater HRM (Halifax/Dartmouth/Bedford) we have a pretty good LTE footprint according to the Rogers website, but my S3 is constantly reconnecting. I can tell because every time it drops LTE, my visual voicemail app will notify that it has no service.
I turned LTE off because it was just hammering my battery. I could barely make it through a 10 hour work day with little to no usage if I leave LTE on, and I'm supposedly in the middle of the service area.
Click to expand...
Click to collapse
Off topic: CM10 has awesome battery life with LTE i find
I first read about LTE causing loss of service several months ago. I returned my first SIII because of it and the replacement phone would also loose service randomly. So now if I want to be assured that my phone is working when I really need it to, I have to disable LTE. Seems like more people need to know this since for some people it is important to know that your phone hasn't just decided to go into NO SERVICE mode without warning.
I'm told service providers were, until recently, strongly denying there is any such problem with LTE. It wasn't until the iphone5 came out with the same issue that this became a real problem for customer service.
What cigar were you smoking?
Sent from my SGH-I747 using Tapatalk 2
Hoshneer said:
What cigar were you smoking?
Sent from my SGH-I747 using Tapatalk 2
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Click to collapse
Partagas Series D #4 and montee cristo edmundo.
stavrosg said:
Partagas Series D #4 and montee cristo edmundo.
Click to expand...
Click to collapse
Mmm, blunt wrap =P
HiKsFiles said:
When I bought my S3 at the Bell store here in Québec city a few weeks ago, the salesmen insisted on NOT giving me a LTE sim card.
What he told me conquers with what you are describing.
I accepted is suggestion and got a H+ micro sim.
Since then, I returned to the store to get a LTE sim card and I did encounter the issue once or twice.
I am now forcing my phone to remain on H+ at best via Settings > Wireless & networks > Mobile networks > Network mode.
Click to expand...
Click to collapse
That's completely stupid... hopefully you didn't have to pay for the replacement.
stavrosg said:
Partagas Series D #4 and montee cristo edmundo.
Click to expand...
Click to collapse
Oh, hell dude. You can never go wrong with a PSD 4 one of my absolute favorite Cubans. I haven't had the Montecristo yet but I've heard good things. Good choices man.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
Not sure if this is the same issue, but I sometimes receive a "not registered on network" or "sim not registered" when phone switches from LTE to 4G or comes back after being in a no service area.
A tech calls me once a week to track the issue and he told me last week they put out a fix for eastern canada and will soon do the same out west if it works. This is Telus by the way.
If you are running into what I mentioned all you have to do is switch to GSM/HSPA Auto mode under - settings/more settings/mobile network/network mode.
Of course you won't have LTE but its a reliable temp solution if you require consistent service.
MTS LTE
I've heard similar from MTS about their LTE!
My Galaxy S3 works fine on LTE, but my brother's S2 LTE never seems to display LTE on the screen, just says 4G all the time, yet speed test results indicate it really IS LTE! The first 2 weeks, his phone kept dropping to NO SERVICE randomly, but more often than not! We swapped out the LTE SIM on day 2 since the first seemed to be defective. After that, I updated the S2 to the latest release OS which seemed to have remove SOME of the issues.
From what I've heard, the LTE towers need the phone to be quiet on network activity for 20 seconds or so before it will attempt to jump back onto LTE. The S3, being much faster, doesn't seem to have issues flipping around as it needs. I'm told they are deciding which software/firmware to upgrade their towers too which will hopefully happen early 2013!
So I'm wondering if this might be the same issue with other carriers, where the problem is ACTUALLY with the towers and not devices?!
zexco said:
That's completely stupid... hopefully you didn't have to pay for the replacement.
Click to expand...
Click to collapse
Not that stupid as I, like I said, did experience the issue since I got my LTE sim card.
But to answer your question, no I did not have to pay for the new sim card.
I've done the same. I find "4G" fast enough for the most part, so I just leave LTE off for the gain in battery life.
Also in Halifax I might add!
Sent from my SGH-I747M using xda app-developers app

Gnex GSM Out of Service

Im not sure if its what caused it but I dropped my GNEX yesterday. It wasnt from very high and ive dropped it before worse than that with no issues. I have have no network signal at all. I cant make calls or text and have no bars. In about phone it says Service State - Out of service. I put my sim in my old nexus one and it works fine. Ive flashed multiple roms, kernels Radios with same issue. Take battery out for a few min and powered back on. Still no service at all. Im guessing the radio is shot. Anyone have any suggestions? i Went ahead and ordered a nexus 4 but who knows when that will show up. its the GSM model on T-Mobile
donfrenchiano said:
Im not sure if its what caused it but I dropped my GNEX yesterday. It wasnt from very high and ive dropped it before worse than that with no issues. I have have no network signal at all. I cant make calls or text and have no bars. In about phone it says Service State - Out of service. I put my sim in my old nexus one and it works fine. Ive flashed multiple roms, kernels Radios with same issue. Take battery out for a few min and powered back on. Still no service at all. Im guessing the radio is shot. Anyone have any suggestions? i Went ahead and ordered a nexus 4 but who knows when that will show up. its the GSM model on T-Mobile
Click to expand...
Click to collapse
Please look at this thread: http://forum.xda-developers.com/showthread.php?p=37784623#post37784623
Also, have you tried using different SIM cards in your GNEX? I have the same problem as you, but I managed to get non T-Mobile sim cards to work.
chowabbajack said:
Please look at this thread: http://forum.xda-developers.com/showthread.php?p=37784623#post37784623
Also, have you tried using different SIM cards in your GNEX? I have the same problem as you, but I managed to get non T-Mobile sim cards to work.
Click to expand...
Click to collapse
Thanks for the reply. I don't have any sim cards that are active to try out in the phone.

Signal cutting off :(

hi all...
currently using tmobile galaxy note 3 with an at&t sim. the phone is in good standing. not blacklisted. i love the phone. currently using slim rom (latest). ever since i got the phone, i been having signal issues. there are times when the phone signal cuts off, no signal at all. and then there are times when, even though, it shows a signal no one can call me, it just rings or cuts the caller after a few rings. sometimes my gf would tell me shes been calling me, but i never got any calls/miss calls. sms would go through though. and when this is happening i would try to call a number, nothing happens, no ringing, no sound at all coming out of the earpiece. a reboot would remedy the issue. but its starting to get annoying.
can anyone help me out here. am i the only one with this issue?
thanks in advance.
wondering if i should install a at&t modem. can anyone tell me if that is a good idea??
are there any hardware differences between the ATT version and the T-Mobile version? I have not done the research, but it is possible that the ATT version does not have the correct GSM/LTE bands to get a good connection on T-Mobile.
I had similar issues using a Verizon Note 2 on T-Mobile and AT&T
I have the same issue. I even tried redoing my apn's and the problem continues...
ukcain said:
I have the same issue. I even tried redoing my apn's and the problem continues...
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Click to collapse
at least now i know i am not the only one with the issue. i hope someone with more knowledge of the issue reads this and helps us.
regarding the frequency bands used, i am not sure.
I have issues if I don't use att after day and use tmobile it won't load data just voice, I turn it off and switch sims and load the data, turn off, switch back to att sim all is well.
Sent from my SM-N900T using Tapatalk

Verizon Note 7 to AT&T

Has anyone fully successfully done this? At first I had 4g data but no texting. I called AT&T gave them the Imei and they got texting working but I lost 4g. I believe my APN is correct. Any thoughts?
dr12volt1338 said:
Has anyone fully successfully done this? At first I had 4g data but no texting. I called AT&T gave them the Imei and they got texting working but I lost 4g. I believe my APN is correct. Any thoughts?
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Click to collapse
Continue calling AT&T. I have had a similar problem when changing phones at Verizon, lost functions, and required more than one call to Verizon tech support, which was eventually resolved. They had to make changes at their end. Your problem may not have anything to do with the N7 factor. Good luck.
I was able to install AT&T ROM to the Verizon Note 7. It was awhile ago and took tons of trial and error, but currently it's running the 6.0.1 without any issues.

AT&T No service

Resolved. Quick phone call to carrier. Needed to be activated with a signal.
Did anyone here with AT&T have a hard time getting the phone to activate?
I set the whole thing up over wifi with no Sim and used it for a couple of hours with no issues.
I needed my working phone for work so I didn't insert the Sim. When I got home I popped the Sim in and there was no service.
I tried inputting the apn and settings manually. The service would pop on then turn back off. I reset network settings. Didn't work.
I factory reset. Didn't work.
Of course a series on reboots, insert/eject Sim...
I've needed to do some work to get phone's activated before but this is different. The wifi turns itself off. The mobile data toggles on and off. And it heats up a bit. I tried doing a factory reset with Sim inserted but then when I tried to set it up, it could not connect to wifi with the Sim inserted. Remove it and wifi works again.
Im probably gonna go to AT&T tomorrow but this is weird. The phone is brand new.
Just thought I'd put it out there. Thanks
I'm on cricket. Only challenge was to provide cricket with an iphone imei so they could activate volte. I get volte but no wifi calling.
What device are you coming from?
gpz1100 said:
I'm on cricket. Only challenge was to provide cricket with an iphone imei so they could activate volte. I get volte but no wifi calling.
What device are you coming from?
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Oneplus 5t. Pretty sure all I had to do was pop in the Sim.
I've had the OnePlus 7t (HD1905) for about 4 months now. Using AT&T and have had no problems at all with it. Popped the sim out of my OP6 and into the OP7t without skipping a beat.
foomanjackel said:
I've had the OnePlus 7t (HD1905) for about 4 months now. Using AT&T and have had no problems at all with it. Popped the sim out of my OP6 and into the OP7t without skipping a beat.
Click to expand...
Click to collapse
That was typically my experience too. But I even put the sim in my son's unlocked phone and it did the same thing. It was actually a relief because I thought that probably meant it was on the carrier's end. It was. I called tech support and they resolved it quick.
AT&T worked for me, excellent data speeds, and great signal. But at times it would go from 4 bars to absolutely no signal, and lots of dropped calls. After that I went to Verizon, not as good of signal, slower data, but no dropped phone calls or mysterious total loss of signal in an area where it should have been 4 bars.
Ever find out about this? I've been using my OP7T with AT&T for a few weeks and once in awhile have this same issue twice now. Nothing you do restores it, but it finally starts working on it's own.
May sound like an odd question, but since some of you guys are using AT&T, can you share your APN settings?
My OP7T is having some weird issues where the wifi hotspot just stopped passing data to any device connected to it. I've reset the phone, all the devices, and tried every combo of APN settings I can find, but it just won't work. It worked fine for months, then nothing.

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