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unlocked want to flash firmware

Was on ATT, unlocked, now on T-Mobile. Phone is 3 yrs old, sketchy; shuts off randomly, has issues. Want to flash firmware, but Sammobile doesn't have 915a. Since it's unlocked and on t-mobile network, can I flash with t-mobile firmware? Can you put any carrier's rom on an unlocked phone? Sammobile has "usa" firmware with no carrier designation.
https://www.sammobile.com/firmwares/galaxy-note-edge/SM-N915R4/USC/
Thanks.

How did it go??
Same phone same problem also on Tmobile now... what did you do??

Use firmware uploaded by makki666
drivesavw said:
Same phone same problem also on Tmobile now... what did you do??
Click to expand...
Click to collapse
Did you find a solution? I flashed the firmware uploaded by makki666 found in another thread on updates for Note Edge from at&t. Right now am using 6.0.1 but may revert to basic 5.1 1 to get temporary root & get rid of bloatware (have not figured out what is worse, outdated OS or bloatware). If you found a better solution, please posr

Can I flash a firmware with a different CSC code?

I recently bought an unlocked AT&T Samsung S20 ULTRA 5G (SM-G988U), it doesn't get any OTA updates, I found out that I would need an AT&T sim card to do so but I'm not an US resident, so I can't get one.
Since AT&T doesn't publicly publish their firmware files and I want to update my phone, I was wondering if flashing my phone using another firmware with a different CSC code like USC (US cellular), would be risky or is it a safe procedure?
This would be my first time doing this procedure and that's the only part that really got me thinking.
Thanks!

U firmware is identical, no matter which carrier it's from. So if AT&T's latest release ends in UH2 and there is also a UH2 firmware from US Cellular, flashing it would be just like flashing the AT&T firmware, if it were available

Also have same question I have Samsung S20 . SM-G988U , service provider software version SAOMC_SM-G988U_OYN_ATT_RR_0018ATT/ATT/ATT Baseband Version G988USQS2SUE2, I am not able to get new updates as I am not in US, I need suggestion which firmware of android 12 I should update on my phone.

Stuck on Android 9 and One UI 1.0

Greetings,
I am a new user here. I just bought Galaxy S10e and I really like the phone, but the problem is that I ordered it from USA (I live in the Republic of Georgia). Originally the phone was from AT&T, but the seller had it unlocked for any GSM carriers and it works fine with my Georgian sim card. The only problem is that I do not receive any software updates. It is stuck on Android 9 and One UI 1.0. When I try to check for updates, it says that my software is up to date. The same happens with Smart Switch.
I tried Frija and Odin. My CSC is G970UOYN1ASD9 and PDA is G970USQS1ASD9. There is no way to download firmware for my own country's CSC, because there is no firmware for SM-G970U (Snapdragon chipset), in Georgia they only sell Exynos ones officially. So, I tried to find updates with CSC ATT in Frija and it does not give me anything. I tried XAA and XAS (which is for unlocked phones) and still nothing. I tried TMK (I think it is for MetroPCS) and USC (This one is for US Cellular) and also TMB (T-Mobile) and they do have Android 11 firmware. But now I am afraid I will break something if I install above mentioned firmware to my device. Or maybe I will not break anything by changing the CSC, but maybe there is also a chance that if I install the above mentioned ones, the phone will get locked on these carriers and I won't be able to use my sim card. Is logical, or am I just overthinking it?
Any help would be really appreciated.
Thanks in advance.

don't flash your nations CSC- that shouldn't matter. Snapdragons LTE bands should be good enough to work internationally
go and reflash a USC or XAA rom with patched ODIN... I had to do this for my phone and OTA started working once it was on the correct CSC
you could even flash it to the latest firmware if you wanted too.

supertac said:
don't flash your nations CSC- that shouldn't matter. Snapdragons LTE bands should be good enough to work internationally
go and reflash a USC or XAA rom with patched ODIN... I had to do this for my phone and OTA started working once it was on the correct CSC
you could even flash it to the latest firmware if you wanted too.
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Click to collapse
Thank you for your answer.
What do you mean by correct CSC? I believe, my phone is on correct CSC now. I have already pasted it and in about phone > Software information > Service Provider it says ATT/ATT/ATT. But it seems that ATT doesn't receive updates outside US.
I cannot seem to find firmware for XAA/XAS, there is one for USC but I have already downloaded TMK. Is there any difference if I install USC or TMK? (TMK is MetroPCS).

GSamkh said:
Thank you for your answer.
What do you mean by correct CSC? I believe, my phone is on correct CSC now. I have already pasted it and in about phone > Software information > Service Provider it says ATT/ATT/ATT. But it seems that ATT doesn't receive updates outside US.
I cannot seem to find firmware for XAA/XAS, there is one for USC but I have already downloaded TMK. Is there any difference if I install USC or TMK? (TMK is MetroPCS).
Click to expand...
Click to collapse
Hi GSamkh... Did you upgraded to 11? Im trying to do the oposite, downgrade from Android 11 to 9. If you didnt the upgrade, can you check if the secure startup (or secure boot) its avaliable? Since in Android 10 and 11 isnt...
Seams that secure startup works on Galaxy S9 with Android 10 upgraded from 9.

dvaguirre said:
Hi GSamkh... Did you upgraded to 11? Im trying to do the oposite, downgrade from Android 11 to 9. If you didnt the upgrade, can you check if the secure startup (or secure boot) its avaliable? Since in Android 10 and 11 isnt...
Seams that secure startup works on Galaxy S9 with Android 10 upgraded from 9.
Click to expand...
Click to collapse
Greetings,
I have already updated to Android 11 using U1 XAA firmware and it works great. I used Frija and then Odin if anyone wants do to do this. Weird thing happened though - when I flashed the firmware and when Odin did it's job, the laptop suddenly shut down and I couldn't turn it back on. I had to disassemble it and unplug the integrated battery, plug it back on and fortunately it turned on again.
As far as your question goes, I am sorry but I cannot check it since I am already on Android 11.

Hi
GSamkh said:
Greetings,
I have already updated to Android 11 using U1 XAA firmware and it works great. I used Frija and then Odin if anyone wants do to do this. Weird thing happened though - when I flashed the firmware and when Odin did it's job, the laptop suddenly shut down and I couldn't turn it back on. I had to disassemble it and unplug the integrated battery, plug it back on and fortunately it turned on again.
As far as your question goes, I am sorry but I cannot check it since I am already on Android 11.
Click to expand...
Click to collapse
Hi GSamkh,
I am experiencing the same issue as you, purchased an AT&T branded SM-G970U for use in Australia. After you flashed to Android 11 using U1 XAA firmware, do you now receive OTA updates? cheers

Question I have an unlocked AT&T Galaxy S21+ outside of the US. If I flash a different firmware(USA - USC) with a different CSC, will I be able to receive OTA

Hello, I would like to preface this by saying that I don't actually live in the US. I got this used unlocked AT&T Galaxy S21+ a few months back and an issue I noticed after using it for a while was the fact I was not receiving any OTA updates due to the fact I was not using an AT&T SIM card.
Now I want to switch AT&T to carrier-free firmware where I will be able to get regular OTA updates automatically
My current specs:
Model: SM-G996U
chip: Snapdragon 888
Baseband version : G996USQU1ATLF
CSC : G996UOYN1ATLF
AP/CP : G996USQU1ATLF
Is it suitable for installation?
https://www.sammobile.com/samsung/g.../SM-G996U/USC/download/G996USQU5CVDB/1640229/
N.B/: May doing this flash will brick or damage my phone?
On SamMobile, underneath my device model, there list of several firmware labeled with different US carriers. As long as the firmware I flash is under the model number I have (SM-G996U), nothing should break, right?
Please suggest me firmware. I want to get rid of carrier barrier and want to get regular updates automatically safely.

Did you try the rom? I have the same problem

OTA is CSC based. You'd have to use Samkey to unlock the CSC to a unlocked US one.

Flash the u1 xaa firmware. Works on my phone in canada

I have a similar issue!
So I received a refurbished S21+, it is unlocked and all but it has AT&T bloatware and I can't update to oneui 5.0... I live in italy but this phone comes from Germany and apparently has a US AT&T firmware (SM-G996U-OYN-ATT). I was following a tutorial with odin to flash to SM-G996B with ITV, which is the italian version with android 12 and oneui 4.1.1 is it safe to do so and then get the android 13 update the standard way? Could I straight up get android 13 and oneui 5 flashing the most recent rom or is it even worse?
The other solution I thought about is that I could just get the U1 XAA, but i have U for now and I don't quite understand if it's completely risk free or not.

Shohan112 said:
Hello, I would like to preface this by saying that I don't actually live in the US. I got this used unlocked AT&T Galaxy S21+ a few months back and an issue I noticed after using it for a while was the fact I was not receiving any OTA updates due to the fact I was not using an AT&T SIM card.
Now I want to switch AT&T to carrier-free firmware where I will be able to get regular OTA updates automatically
My current specs:
Model: SM-G996U
chip: Snapdragon 888
Baseband version : G996USQU1ATLF
CSC : G996UOYN1ATLF
AP/CP : G996USQU1ATLF
Is it suitable for installation?
https://www.sammobile.com/samsung/g.../SM-G996U/USC/download/G996USQU5CVDB/1640229/
N.B/: May doing this flash will brick or damage my phone?
On SamMobile, underneath my device model, there list of several firmware labeled with different US carriers. As long as the firmware I flash is under the model number I have (SM-G996U), nothing should break, right?
Please suggest me firmware. I want to get rid of carrier barrier and want to get regular updates automatically safely.
Click to expand...
Click to collapse
I'm having the same issue with my Samsung S20 Ultra 5G SM-G988U i bought the device yesterday and it accept my local Sim here but the issue is that there is limited features, for example I can't turn On/off my mobile data on and I can't change network mode like selecting from 4G to 5G

Question SM-F721U1 with sm-f721u firmware

Hi all,
Anyone tried to burn a SM-F721U1 device with sm-f721u firmware?
I remember doing it on a note10. Question is if it's still possible?

seems to flash just fine. I have only found tmo and u1 with july patch... are there others?

I tried. Mobile network get disabled. Grey out in status bar. I am using US Mobile services. I have to do a fresh flash A12 VZW build to get back working handset.

I was wondering this as well. I purchased my first unlocked phone and now I wait for the 13 update, while the T-Mobile version is already out. I am on T-Mobile, so I'm guessing it will work just fine. Will my phone still be "unlocked" if I flash the SM-F721U firmware?