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Flashing T-Mobile Firmware to AT&T N900A Variant

Hi Everyone -
AT&T finally gave me the unlock code for my Galaxy Note 3 SM-N900A phone. I'd like the move it to T-Mobile, but have some questions before I do:
1. Is there any way to flash the T-Mobile/N900T firmware to an AT&T N900A variant? I'm talking the official factory firmware...CSC, bootloader, radio, everything needed to essentially do a complete conversion. I'm not interested in custom ROMs based on T-Mobile's firmware and that kind of thing. I assume if there is a way, it's not as simple as flashing N900T firmware in ODIN, since it would probably fail the model checks.
2. Is there any way of enabling the 1700 MHz AWS band for HSPA+ on an N900A? I know it works fine on T-Mobile LTE and will also work on HSPA+ in areas where T-Mobile has refarmed it for 1,900 MHz. I assume the 1,700 MHz lockout on the AT&T version is probably a software limitation inside the modem firmware.
If anyone can shed some light on this, I'd appreciate it.
Thanks!

oldblue910 said:
bootloader, radio
Click to expand...
Click to collapse
You can't flash them or you would get hard brick. If that were the case people would have already unlocked their BL's using T-Mobile

Walter.White said:
You can't flash them or you would get hard brick. If that were the case people would have already unlocked their BL's using T-Mobile
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Click to collapse
Figured.
Sent from my Galaxy Note 3 using Tapatalk

I wonder why it would hard brick though. With the exception of atts bl being locked, wouldn't it all be relatively the same? Would it be possible to clean up the n900T bl to match the n900a?
Sent from my SAMSUNG-SM-N900A using xda app-developers app

oldblue910 said:
Hi Everyone -
AT&T finally gave me the unlock code for my Galaxy Note 3 SM-N900A phone. I'd like the move it to T-Mobile, but have some questions before I do:
1. Is there any way to flash the T-Mobile/N900T firmware to an AT&T N900A variant? I'm talking the official factory firmware...CSC, bootloader, radio, everything needed to essentially do a complete conversion. I'm not interested in custom ROMs based on T-Mobile's firmware and that kind of thing. I assume if there is a way, it's not as simple as flashing N900T firmware in ODIN, since it would probably fail the model checks.
2. Is there any way of enabling the 1700 MHz AWS band for HSPA+ on an N900A? I know it works fine on T-Mobile LTE and will also work on HSPA+ in areas where T-Mobile has refarmed it for 1,900 MHz. I assume the 1,700 MHz lockout on the AT&T version is probably a software limitation inside the modem firmware.
If anyone can shed some light on this, I'd appreciate it.
Thanks!
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2625946
Make sure you pay attention to the Modificatinator file and add the T-Mobile carrier file after installation. Works fine and much better than stock ATT junk rom.

Quick question to everybody on here... Is it possible to ODIN the baseband/modem for N900A to the N900T? I want to do this because my service provider is Cricket, which is an MVNO of AT&T. It's not a priority, but is it possible?

deBricker said:
Quick question to everybody on here... Is it possible to ODIN the baseband/modem for N900A to the N900T? I want to do this because my service provider is Cricket, which is an MVNO of AT&T. It's not a priority, but is it possible?
Click to expand...
Click to collapse
Probably, and if it doesn't work you can Odin the stock NC2 or NL1 firmwware back and start again with this ROM.
But why? If you're getting LTE the way your phone is (assuming Cricket is giving you LTE), you won't gain anything by flashing a different modem. (Unless you're getting a lot less signal with this ROM than you were with the NC2 or NL1 modems.)

Tmobile rom on AT&T Note 3?

Is this possible to install a tmobile stock rom on the at&t note 3 or will the locked bootloader prevent this? just curious as i'm gonna be moving to tmobile for the unlimited LTE and would like to use the stock apps as well with it. Does anybody know if this is possible? I looked around a little bit and couldn't find any information on doing this.

syrkel2 said:
Is this possible to install a tmobile stock rom on the at&t note 3 or will the locked bootloader prevent this? just curious as i'm gonna be moving to tmobile for the unlimited LTE and would like to use the stock apps as well with it. Does anybody know if this is possible? I looked around a little bit and couldn't find any information on doing this.
Click to expand...
Click to collapse
1. This should be in the help section
2. I've flashed verizon roms on my note 3 without a problem so it's possible. All you'll have to do is update your APN settings. It can't hurt to try it, that's the point of safestrap!

Yeah I'm not rooted so was wondering if the tmobile rom via Odin would fail or not
Sent from my SAMSUNG-SM-N900A using Tapatalk

AT&T Note 3 ROMS on Tmobile version?

I have an unlocked Tmobile Note 3 (running on AT&T network) and I would like to know if I could install roms from AT&T version on it? If so, do I need to do anything special for it?

In my opinion it would be a downgrade. At&t packs it's devices with bloat.
Any particular reason you want an at&t rom?

How to downgrade from 4.4.4 (NJ5) to 4.4.2 (NC2)? [AT&T Note 3 for T-Mobile]

Hey guys,
Upon reading through the threads, I wasn't able to find specifics to what I'm looking for.... it's apparent that the support has stopped for this issue, which I completely understand. Any help would be greatly appreciated.
I have an unlocked ATT Note 3 on (NJ5) to be used on T-Mobile.
I'm wanting to downgrade from 4.4.4 to 4.4.2 to get back to (NC2).
Can someone confirm the following: (Please add to it if I'm missing something)
Odin ATT 4.4.2 (NC2) - Anyone have the direct link?
Root - Best method?
Safestrap work around? Is this the correct thread? How about this?
Planning to flash ATT FireKat (TouchWiz based) ROM....
From my understanding:
I only have one shot at this, therefore, I want to make sure that all my ducks are in a row before doing this as a "mistake," isn't an option right? I only have one shot at this or Hard brick yes?
Questions:
After successfully doing all this, with the correct TM APN settings, will the ATT phone be able to use all TM's bands? LTE 1700, Band 4 etc....
What are any drawbacks of using the ATT N3 on TM, if any? (I'll be happy with 4.4.2 so no worries on any fancy updates.)
The phones currently unlocked right now. Will doing the steps above lock the phone back up?
Is this all worth it or should I just sell the ATT N3 and buy a TM branded one?
Is there anything I'm missing?
Thanks in advance!
* I hope this post also helps anyone in the future that's in the same boat as I am.

http://forum.xda-developers.com/note-3-att/general/n900aucucnc2-odin-files-t2838117
this will give you 100% stock nc2.
Best way to root is with towel root.
with safestrap you do not need a workaround as it works perfect on nc2 you only need to do a workaround if you would like to go to 4.4.4...And for the record I've done a lot of flashing of random stuff that came from here and I did myself and I'm yet to hard brick or come from a point of no return.
all those t-mobile questions I can't answer cause t-mobile is crap in my area..
Hope this helps!

yourbeatdude said:
http://forum.xda-developers.com/note-3-att/general/n900aucucnc2-odin-files-t2838117
this will give you 100% stock nc2.
Best way to root is with towel root.
with safestrap you do not need a workaround as it works perfect on nc2 you only need to do a workaround if you would like to go to 4.4.4...And for the record I've done a lot of flashing of random stuff that came from here and I did myself and I'm yet to hard brick or come from a point of no return.
all those t-mobile questions I can't answer cause t-mobile is crap in my area..
Hope this helps!
Click to expand...
Click to collapse
Thanks a bunch! I really appreciate it.
To confirm:
From a dead stop (the state my phone is at right now on NJ5)...
1. Odin NC2. (Which one specifically shall I download? I see a bunch of different links.)
2. Towel Root.
3. Put the TM Sim in...add APN's...
4. Flash ROM if desired...
5. Good to go?

Just need these 4... and if you want to rom you need to install busy box and safestrap after you root with towel root. Then yea should be good to go!

yourbeatdude said:
Just need these 4... and if you want to rom you need to install busy box and safestrap after you root with towel root. Then yea should be good to go!
Click to expand...
Click to collapse
Thanks again!
Ok so I'll ODIN those 4 files, then ROOT, then install safestrap, then busybox, and then ROM .... all in this order?

iunlock said:
Thanks again!
Ok so I'll ODIN those 4 files, then ROOT, then install safestrap, then busybox, and then ROM .... all in this order?
Click to expand...
Click to collapse
Busy box first then safestrap...

yourbeatdude said:
Busy box first then safestrap...
Click to expand...
Click to collapse
Gotcha. Thanks!
Oh and would you happen to know if the ATT device has the 1700 band (band 4) to support TM's LTE? I remember with the older devices ATT branded phones didn't have the 1700 build in, but now I'm thinking it might be different....hhmm
Also, it is unlocked right now...will the phone lock itself after all this?

iunlock said:
Gotcha. Thanks!
Oh and would you happen to know if the ATT device has the 1700 band (band 4) to support TM's LTE? I remember with the older devices ATT branded phones didn't have the 1700 build in, but now I'm thinking it might be different....hhmm
Also, it is unlocked right now...will the phone lock itself after all this?
Click to expand...
Click to collapse
Not sure but I think there is some that use att note 3 on t-mobile and works fine I'm guessing... and personally never unlocked a phone for use elsewhere as I been with att for like 10 years lol... but I really don't see it locking it personally...

Help on using 4G LTE in Pakistan
I have just received my AT&T Samsung Note 3 model SM N900A and am using it in Pakistan with warid network. I received the sim unlock code from AT&T. Warid is giving us 4G LTE service but my cell does not work on it. Since warid is not giving 3G service, my cell just connects using edge which is very slow. I actually bought Note 3 for 4G LTE but due to some reason its not working. The carrier people have no answer except that my set is not supported by their system. Can you kindly help? My set is not rooted.
Warid 4G LTE is working on 1800Mhz FDD Band 3 which is supported by my set. Other device parameters are as below:
Baseband version N900AUCUBMJ5
kERNEL VERSION 3.4.0-1625098
[email protected] #1
build JSS15J.N900AUCUBMJ5
Android version 4.3
And I would also like to know if I can update my set to newer android version or not?
Awaiting your positive response.
[email protected]

Question, are these files also downgrade the modem firmware to match the 4.4.2 ROM?
The reason I want to downgrade to 4.4.2, is to fix the GPS signal issue we all AT&T Note 3 owners having after the 4.4.4 update. Does anyone downgraded to 4.4.2 and GPS issues fixed?

Some questions about the Sprint Note 5

Hello everyone!
I got the sprint note 5 running android nougat a few days ago but i'm having a problem... I doesn't let me use 4G Lte and that is a must for me. (Because of how data plans are here). I did some research regarding this device and it seems like its identical to the international note 5 which made me assume that the only thing blocking me from the 4g is the system installed in this phone. What i want to know is: Will i have 4G/LTE if i flash twrp and install a custom rom? The band i need is B7 (2600).
Your help would mean a lot.
Thanks!
PS: If I can't get this to work with 4g ill have to get a verizon note 5 which, from my past experience with verizon devices should have a locked bootloader and pretty much i'll be stuck to android 7.0 :crying:

-Configure your APNs and reboot
-Get your phone unlocked by Octoplus box
-Yeah, you could try a custom ROM