Flash S8+ Unlocked Firmware to ATT S8+ but retain VoLTE - Samsung Galaxy S8+ Questions & Answers

I have a sim unlocked ATT Galaxy S8+ on Android 9 (Pie) being used on the VZW network.
I would like to flash to the"unlocked USA" firmware but retain Volte (CSC). I have read the unlocked firmware does not support VoLTE.
Is there anyway to do this?
Thanks in advance.
***Update***
Process Complete.

Related

Will flashing my unlocked sm-g930t lock it?

I just purchased a Galaxy S7 SM-G930T online but I live in Canada and use the Koodo Network. I can put my Koodo sim in and it all works fine but I want to update it from 6.0.1 to Android 8, and it wont let me do it OTA if I dont have a T-Mobile sim. Can I download the stock T-Mobile Android 8 Firmware and flash it using Odin and still be able to use my Koodo sim or does flashing the stock firmware lock the phone?
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Will flashing my unlocked sm-g930t lock it?

I just purchased a Galaxy S7 SM-G930T online but I live in Canada and use the Koodo Network. I can put my Koodo sim in and it all works fine but I want to update it from 6.0.1 to Android 8, and it wont let me do it OTA if I dont have a T-Mobile sim. Can I download the stock T-Mobile Android 8 Firmware and flash it using Odin and still be able to use my Koodo sim or does flashing the stock firmware lock the phone?
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Flashing Sprint S7 SM-G935P to SM-G935U

Hello,
I am going to attempt to Flash my Sprint S7 Edge with current Firmware version G935PVPS8CRK1 to the Unlocked firmware of G935UUES8CRK1 as I have ported out of Sprint and need to enable all LTE bands for a different network now.
My questions are
Can this be done for the above firmware versions and will it enable all LTE bands if successful ?
In the SAMMOBILE page, there are different variants for the SMG935U including one for Sprint. I was assuming that all 935U variants would be identical, but I guess I'm mistaken. So, should I download the Sprint version of SMG835U or something else ?
Optms2 said:
Hello,
I am going to attempt to Flash my Sprint S7 Edge with current Firmware version G935PVPS8CRK1 to the Unlocked firmware of G935UUES8CRK1 as I have ported out of Sprint and need to enable all LTE bands for a different network now.
My questions are
Can this be done for the above firmware versions and will it enable all LTE bands if successful ?
In the SAMMOBILE page, there are different variants for the SMG935U including one for Sprint. I was assuming that all 935U variants would be identical, but I guess I'm mistaken. So, should I download the Sprint version of SMG835U or something else ?
Click to expand...
Click to collapse
Never mind, I was able to flash the G935UUES8CRK1 firmware. Also, in Odin I tried with the HOME CSC. Although Odin showed a successful status, my device went into a dm verity boot loop. Then I had to flash it again with the regular CSC file and it worked.
I'm about to do the same thing, were you able to use LTE and VOLTE? Or access other bands that didn't work while on the sprint firmware? Right now i have the sm-g935p and am using it with t-mobile. I can only get 3g speed and have voice working or LTE with no voice.
Yeah, LTE was working. Band 40 which was otherwise disabled in the Sprint firmware was open and LTE Discovery app confirmed it. Not sure about VoLTE.
bootdsc said:
i'm about to do the same thing, were you able to use lte and volte? Or access other bands that didn't work while on the sprint firmware? Right now i have the sm-g935p and am using it with t-mobile. I can only get 3g speed and have voice working or lte with no voice.
Click to expand...
Click to collapse
are we now able to flash u firmware to sprint g935p s7 edge again
jackphillips said:
are we now able to flash u firmware to sprint g935p s7 edge again
Click to expand...
Click to collapse
Yes. The bootloader was updated a few months ago. There is a thread here with files and instructions.
https://forum.xda-developers.com/sp...0u-firmware-bootloader-update-device-t3863219
flashing u firmware to sprint model G935p phone
lvpre said:
Yes. The bootloader was updated a few months ago. There is a thread here with files and instructions.
https://forum.xda-developers.com/sp...0u-firmware-bootloader-update-device-t3863219
Click to expand...
Click to collapse
if i flash my sprint phone to u firmware, do i need to download the exact same rom that own mine right now. my rom is G935UUES8CRK2_ so i downloaded the same g935u firmware from samsung sense it would have the same bootloader 3/28/2019
flashing u firmware to sprint model G935p phone
if i flash my sprint phone to u firmware, do i need to download the exact same rom that own mine right now. my rom is G935UUES8CRK2_ so i downloaded the same g935u firmware from samsung sense it would have the same bootloader

AT&T S8+ Phone want to Install U1 firmware

If I install G955U1 firmware on my AT&T S8+ will I still have VoLTE??? It is a Sim Unlocked AT&T phone Branded!!

Help Flashing a S7 Verizon

My Uncle got me a verizon galaxy s7 from USA and now I am trying to run a 4G sim in it but it isn't working as VoLTE is not activating ( something called Advanced HD Calling) as verizon wants verification for it and as the device is here we can't do that
I was thinking of flashing an Indian Firmware on it
Will that help me ??
Or is there anything else I can do.
Please Help.
update 1 : I managed to unlock the bootloader
If it's a Verizon S7 it'll be a G930V which uses Snapdragon, you can't flash Indian firmware on it because India uses the G930F model which has Exynos SoC.
Also despite the bootloader unlock option being available and toggleable in developer options, it doesn't actually do anything on USA models. Don't attempt to flash custom recovery, it'll brick.
Your best bet would be to flash the unbranded USA firmware (G930U) which should rid the phone of Verizon, however it's unlikely that'd let you use local carrier VoLTE.
I can run an Indian Sim in this device its just that the Volte doesn't work
I can still make it work with an app from the provider
should i just make do with the app or try the unbranded firmware?
also the other s7 my uncle sent me has FRP locked and the seller can't obviously give me his gmail to unlock it.
Is there anything I can do to bypass it or do I have to send it back to USA? also i have no clue if it has OEM unlocking enabled

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