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AT&T Note 3 SM-N900A on T-M network issues?

Hello everyone, based on extremely poor ATT coverage in my area comparing to T-M I plan to purchase AT&T Note 3 SM-N900A, unlock it and use with T-M SIM card.
Would I face any issues in terms of unlocking and data coverage?

toshik1 said:
Hello everyone, based on extremely poor ATT coverage in my area comparing to T-M I plan to purchase AT&T Note 3 SM-N900A, unlock it and use with T-M SIM card.
Would I face any issues in terms of unlocking and data coverage?
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Soooo.... why would you want to buy a N900A. I feel like we are missing some piece of info. What about getting the N900T and having the best of both worlds. The modem on the N900A is more restricted than the Tmobile version (surprise surprise).

mircury said:
Soooo.... why would you want to buy a N900A. I feel like we are missing some piece of info. What about getting the N900T and having the best of both worlds. The modem on the N900A is more restricted than the Tmobile version (surprise surprise).
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Really? I'm glad I asked prior to spending the $$$
Other than the firmware the phones are identical, correct?
Right now I borrowed Note 2 AT&T SGH-I317 and it seems (to me) to work OK on T-Mobile.

Yes, the Note 2 was one of the last phones before ATT went crazy and started locking down everything. You could enable the AWS bands of tmobile on the ATT note 2. Here is a guide for the N900T if you go that route. Many of us are doing it. You can use it on either carrier. If you are going to use tmobile you might as well use the wifi calling also. It's free and only on the N900T.
http://forum.xda-developers.com/showthread.php?t=2464498

mircury said:
Yes, the Note 2 was one of the last phones before ATT went crazy and started locking down everything. You could enable the AWS bands of tmobile on the ATT note 2. Here is a guide for the N900T if you go that route. Many of us are doing it. You can use it on either carrier. If you are going to use tmobile you might as well use the wifi calling also. It's free and only on the N900T.
http://forum.xda-developers.com/showthread.php?t=2464498
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Thank you! But the guide is for using T-Moblie phone on AT&T network, I have the opposite.

toshik1 said:
Thank you! But the guide is for using T-Moblie phone on AT&T network, I have the opposite.
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I know. My point is that the N900T works perfectly on ATT and Tmobile. It works on both carriers and is the most up to date. The N900T has had J7 for a week where the ATT model just is now getting J5. The carrier specific features like wifi calling are not on the N900A.
Also if you read in that thread I list the fcc bands that are active on the N900A compared to the N900T. They are more restricted than the Tmobile version.

mircury said:
I know. My point is that the N900T works perfectly on ATT and Tmobile. It works on both carriers and is the most up to date. The N900T has had J7 for a week where the ATT model just is now getting J5. The carrier specific features like wifi calling are not on the N900A.
Also if you read in that thread I list the fcc bands that are active on the N900A compared to the N900T. They are more restricted than the Tmobile version.
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Ok thanks again, all I need is the best deal on either used or new N900T. I don't see any listed on Amazon and pricegrabber brings up three crazy deals price of $700 with signing up with T-Mobile

toshik1 said:
Ok thanks again, all I need is the best deal on either used or new N900T.
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Yes, you will definitely be happier especially if you are wanting to use it on the T-mobile network.

att sim in n900t? HSPA+&LTE?
Sorry for barging in just a quick question and this thread seems to be the most logical place to ask. Anyway, I have AT&T and just got the Note 3 n900a. If i got a T-Mobile version n900t and put my AT&T Sim in it if i unlock it, will i be able to use it with AT&T's data like hspa+ and LTE or will i just be limited to EDGE. Only reason i ask is because like you say AT&T is going nuts with locking everything down and Im sure its going to be a pain in the a** for the Devs to unlock the bootloader so we can (when it comes) flash custom recoveries and roms. Just like with my att galaxy s4. I was happily rooted and at the time i didnt flash a rom yet i was waiting to find one i like. (mind you i was on the MDL build) and as forgetful as i am just being stock rooted i never froze the samsung software update and it updated to MF3 build and wasnt able to fash a recovery. so i unrooted, reset flash counter and did a warranty exchange and was lucky to get one on still on the MDL build. the second i got that i rooted flashed CWM recovery and flashed a custom rom so it wouldnt update on me. I just dont want the same situation for when the devs unlock the bootloader and get a flash able recovery so just thinking maybe a tmobile note 3 with my att sim may be the way to go to avoid that. lol Not like the note 3 needs any custom rom with the beast of a phone it is but sometimes i like to switch up and use stock/aosp android.
Thanks and sorry for the paragraph here and my apologies if i asked in the wrong spot,
Dave

ddix585 said:
Sorry for barging in just a quick question and this thread seems to be the most logical place to ask. Anyway, I have AT&T and just got the Note 3 n900a. If i got a T-Mobile version n900t and put my AT&T Sim in it if i unlock it, will i be able to use it with AT&T's data like hspa+ and LTE or will i just be limited to EDGE. Only reason i ask is because like you say AT&T is going nuts with locking everything down and Im sure its going to be a pain in the a** for the Devs to unlock the bootloader so we can (when it comes) flash custom recoveries and roms. Just like with my att galaxy s4. I was happily rooted and at the time i didnt flash a rom yet i was waiting to find one i like. (mind you i was on the MDL build) and as forgetful as i am just being stock rooted i never froze the samsung software update and it updated to MF3 build and wasnt able to fash a recovery. so i unrooted, reset flash counter and did a warranty exchange and was lucky to get one on still on the MDL build. the second i got that i rooted flashed CWM recovery and flashed a custom rom so it wouldnt update on me. I just dont want the same situation for when the devs unlock the bootloader and get a flash able recovery so just thinking maybe a tmobile note 3 with my att sim may be the way to go to avoid that. lol Not like the note 3 needs any custom rom with the beast of a phone it is but sometimes i like to switch up and use stock/aosp android.
Thanks and sorry for the paragraph here and my apologies if i asked in the wrong spot,
Dave
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This thread is huge but hopefully has everything you would want to know on the topic. Look at the first post.
http://forum.xda-developers.com/showthread.php?t=2464498

Updating unlocked ATT Galaxy S5 now on T-mobile network

I assume my idea would work but here is the issue:
My wife has an unlocked ATT Galaxy S5 that we are now using on T-Mobile. Obviously she can't get the recent security updates and marshmallow when it comes out. I don't really want to go the odin route with her phone and risk our marriage (lol) with wiping her data. If I put a sim card from ATT from a friend in her phone, it should then allow it to receive updates correct? I assume our old sim card, which is not associated with a number on the ATT network would not work.

I'm not sure. I'm on AT&T and I can't get the last two or three updates to even register on my phone. Usually someone uploads an OTA zip that you can boot into recovery mode and install, but the latest ones have been neglected. Hopefully someone with more knowledge of the situation can give you a better answer, though.

I'm currently using Net 10 service on my Att S5 active and seem to get OTA updates.

Pajar0913 said:
I'm currently using Net 10 service on my Att S5 active and seem to get OTA updates.
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Hmmmmm that's interesting. Maybe, then, we don't need to worry about them coming eventually.

Unfortunately not seeing the Marshmallow update via my ATT S5 running on T-Mobile. The phone says it is "up to date"......

Redhawk2000 said:
Unfortunately not seeing the Marshmallow update via my ATT S5 running on T-Mobile. The phone says it is "up to date"......
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Same here. It's really a bit of a shame. I'm thinking of selling line on swappa just to turn around and buy the t-mobile variant so I can root
Sent from my iPhone using Tapatalk

If I can I'm going to try a friends att sim card in it to see if it can then download it.

If you throw an AT&T sim in, make sure its from an android device with LTE. Cruise the web a little a make a phone call. reboot after 15 minutes so AT&T's systems recognize your model and software before trying the software update.
Although the best bet would be taking it either to a AT&T service center or a Samsung shop in Best Buy, they can flash the update for you w/o wiping it
you can backup the device with Samsung smart switch on a laptop and keep most of everything just in case anything happens.

Flash PA2 firmware through ODIN and then these through recovery:
http://forum.xda-developers.com/att...les-tested-update-to-marshmallow-ph2-t3450223

SM-T817A and a carrier move

Sorry if this is a real noob question, but...
I have the AT&T version of the SM-T817 and just recently moved all devices over to T-Mobile. The tablet is unlocked and the new SIM card is in place and working fine.
My question: is it possible to flash the T-Mobile version of Android over this? Don't know (but can guess) whether the bootloader is locked (the tablet is not rooted). The main reason would be to get the MM update, which I am pretty sure AT&T will never actually release. My guess is that it would not be possible and if there was an LTE-supported version of a custom ROM out there, that might be the only way to go.
So...possible? And if not, is there a ROM someone could recommend which is based on MM and supports T-Mobile LTE?

I know this is an old thread, but I'm hoping someone has an answer. I'd like to know too.

So, at long last an update: I am on T-Mobile with the tablet unlocked, but still using AT&T's version of Android (now on Marshmallow). I updated the tablet while still on AT&T, and now that I am on T-Mobile the software is apparently locked at the current version because I can't connect with the AT&T upgrade servers. T-Mobile is more than willing to sell me their version of the tablet at $50 more than AT&T, but I imagine the lifespan of the S2 is pretty limited. I don't see any upside to buying the same tablet again for more money and maybe 6 months before there is a replacement...

I'm having the same questions!

Flashing AT&T firmware to an unlocked T-Mobile Galaxy S8

OK guys, somewhat of a newbie, so try and give me a break. I am looking to upgrade to a Galaxy S8 and came across an unlocked T-Mobile S8. Can I flash the AT&T firmware to this phone? If I run the T-Mobile firmware on the AT&T network, I assume I won't get any updates? What about the radios? I know both are GSM networks and with both the AT&T and T-Mobile S8 sharing the same model number, I assume this won't be a problem.
Anyway, any guidance is appreciated.
Thanks!!!

I'm looking for the same answer

I believe if it's unlocked from t-mobile, all you have to do is put your sim in it. Given they are both GSM and all the relevant info is stored on sim card and not the phone
Sent from my Samsung SM-G950U using XDA Labs

you will still get updates from t-mobile. i am using a note 4 unlocked from tmobile on at&t for about a year, getting my s8+ tomorrow actually. the only thing you have to do is add at&t apn settings which are easy to find if you google. i would like to know if its possible to flash another carrier and then flash back to the phone's original carrier tho

Moving a Verizon Galaxy S8 to T-Mobile

I have a Verizon branded Galaxy S8, and I may plan to move to T-Mobile in the future. I know a lot of folks have either flash stock Samsung firmware or T-Mobile firmware, but I read that thanks to a recent update, the phone will adapt to any SIM card that's inserted into the phone. Is this true? Will a T-Mobile SIM work in a Verizon branded phone without flashing the phone first with features like MMS and Wi-Fi Calling?
Would there be any added benefits to flashing a stock or T-Mobile firmware at this point?
Thanks!

imbrenden said:
I have a Verizon branded Galaxy S8, and I may plan to move to T-Mobile in the future. I know a lot of folks have either flash stock Samsung firmware or T-Mobile firmware, but I read that thanks to a recent update, the phone will adapt to any SIM card that's inserted into the phone. Is this true? Will a T-Mobile SIM work in a Verizon branded phone without flashing the phone first with features like MMS and Wi-Fi Calling?
Would there be any added benefits to flashing a stock or T-Mobile firmware at this point?
Thanks!
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For the most part yes they adapt themselves now. Some have to be SIM unlocked but I believe the Verizon model already is. It should say SIM inserted please restart. It will install all the t mobile junk including any volte or WiFi calling. They might have.

I actually put in my Simple mobile sim card into my unlocked Verizon S8 and calling works but im not getting any decent data even tho i live in a area. With good coverage. Would i have to somehow flash tmobile radio? I been corrected the apn settings

Professor may have to manual add the access point. I had to when I did a verizon Z force 2 to Att.