[HOW TO] Carrier Switch Galaxy S8/S8+ **SNAPDRAGON**

Search This thread

otkaz

Member
Jan 28, 2011
7
0
Houston
I'm wanting to flash a stock TMobile firmware onto a S8+ that currently has a really old at&t firmware on it( still on Android 7.0). Do I need to do this or can I just flash the TMobile firmware and expect it to work?
 
*READ FIRST*
This thread is now completely dedicated to the aspect of Carrier Switching on the Snapdragon model of the Galaxy S8/S8+, the current root progress can be seen here:
Current ROOT Progress for G950U/G955U Snapdragon


Please Note that if your device is network locked this WILL NOT unlock it for use on other carriers, however it will allow the switching of carriers and carrier specific features on network unlocked devices just by changing sim cards, the device will reboot and your done. As for those with a network locked device this thread still applies to you, if you are interested in a bloat free experience(that is faster and smoother than stock touchwiz), on your Galaxy S8/S8+


Let's Begin!
  1. Download the firmware for the unlocked S8/S8+ here:
    G950U1UE1AQDC_XAA
  2. Download the Prince Cosmy version of Odin here:
    Odin_3.12.3_Modified
  3. Enable developer options on your device:
    Settings----->About Phone----->Click Build Number 7 times
  4. Enable USB Debugging:
    Settings----->Developer Options-----USB Debugging
  5. Put your device into download mode: Volume Down + Bixby + Power
    (accept the warning and connect your device to your computer)
  6. Take the G950U1.zip you downloaded in step 1 and extract it, then place the BL,AP,CP,and CSC files into their corresponding places within Odin and press start
  7. Once finished the device will boot back up and you will be free to disconnect it from your computer
  8. You now have the unlocked, bloat free, firmware on your S8/S8+

CONTRIBUTORS
@Maltego for hosting files
@mweinbach for originally getting the unlocked firmware and for posting a tutorial on flashing it
@Acoustichayes for creating a dedicated root thread​
This works with missing oem unlock?
 

xcutnr1

Member
Dec 25, 2011
27
0
Hopefully quick question: I've got 950u1 that I need root on along with voLTE and hopefully wifi calling (att or tmo, don't care which). Does this work after rooting, or is there something else I need to look at to get them working after root?
 

xcutnr1

Member
Dec 25, 2011
27
0
Update for anyone interested. Still works. I used 3B PatcheD/ModdeD 3.14.1 with latest XAA firmware on SPR model g950u to gain access to wifi calling and voLTE on mint(t-mobile). Now have XAA/XAA/SPR for CSC.
 

xcutnr1

Member
Dec 25, 2011
27
0
Hopefully quick question: I've got 950u1 that I need root on along with voLTE and hopefully wifi calling (att or tmo, don't care which). Does this work after rooting, or is there something else I need to look at to get them working after root?

Answers: turns out I have a g950u Sprint version that someone changed to show g950u1. Did get it working on T-mobile. After loosely following directions here, got it working on latest Pie ROM. Rooted using JR Kruse's newer method on nougat, then had to go into system/omc and change name of XAA folder to XAAbak and changed TMB folder to XAA. Thanks to JR Kruse for this suggestion as well.
 

Top Liked Posts

  • There are no posts matching your filters.
  • 43
    *READ FIRST*
    This thread is now completely dedicated to the aspect of Carrier Switching on the Snapdragon model of the Galaxy S8/S8+, the current root progress can be seen here:
    Current ROOT Progress for G950U/G955U Snapdragon


    Please Note that if your device is network locked this WILL NOT unlock it for use on other carriers, however it will allow the switching of carriers and carrier specific features on network unlocked devices just by changing sim cards, the device will reboot and your done. As for those with a network locked device this thread still applies to you, if you are interested in a bloat free experience(that is faster and smoother than stock touchwiz), on your Galaxy S8/S8+


    Let's Begin!
    1. Download the firmware for the unlocked S8/S8+ here:
      G950U1UE1AQDC_XAA
    2. Download the Prince Cosmy version of Odin here:
      Odin_3.12.3_Modified
    3. Enable developer options on your device:
      Settings----->About Phone----->Click Build Number 7 times
    4. Enable USB Debugging:
      Settings----->Developer Options-----USB Debugging
    5. Put your device into download mode: Volume Down + Bixby + Power
      (accept the warning and connect your device to your computer)
    6. Take the G950U1.zip you downloaded in step 1 and extract it, then place the BL,AP,CP,and CSC files into their corresponding places within Odin and press start
    7. Once finished the device will boot back up and you will be free to disconnect it from your computer
    8. You now have the unlocked, bloat free, firmware on your S8/S8+

    CONTRIBUTORS
    @Maltego for hosting files
    @mweinbach for originally getting the unlocked firmware and for posting a tutorial on flashing it
    @Acoustichayes for creating a dedicated root thread​
    13
    Just to chime in before people start heading down the wrong path and getting too excited.
    Fastboot doesn't work on Samsung devices.
    OEM unlock is merely to disable Google's FRP Lock and has nothing to do with the manufacturers bootloader lock.
    All Qualcomm S8's will have a locked bootloader as confirmed by Samsung.
    Nothing custom including TWRP can be flashed to this device except the possibility of a custom rom.

    The factory binary (combination firmware) is not the full Engineering binary.
    The S7 had the full Engineering binary, so the exploit used on that won't work on the S8.

    Only the boot.img from the factory software needs to be flashed.
    This allows the device to boot in permissive mode, dmverity disabled, kernel rooting restrictions disabled and adb enabled by default.

    Having dealt with these binaries to gain root on other bootloader locked devices.
    Adb method won't work because a full root shell with write access isn't possible.

    The method that has worked for Marshmallow is to use King root to gain root then SuperSUME to convert.

    OEM unlock must still be enabled and the factory binary must remain or the device will soft brick.
    12
    Factory Binary Firmware for G955U
    MD5: e5ec00ac34efa8f42b81af3f8478d71c
    12
    This thread was initially started as a root/carrier switching research and development thread, it has veered more towards the aspect of carrier switching but there still is a hangouts group of a few devs working on root, including some from the dirty santa exploit on the v20. Any devs interested in joining PM me or elliwigy. As for the comments please refrain from putting others down, being negative/disrespectful, and if these comments persist to all others please ignore them! Thank you all for the effort put into this thread hopefully we will be able to achieve root (without an eng kernel lol) and full carrier switch!

    Thank You,
    TimelessGoD
    10
    Good call going exynos. Be careful these snapdragon owners are very fussy they can't get anything working after 900+ posts

    be careful of these exynos users clogging up a snapdragon thread with negativity as they dont seem know what theyre doing or how to contribute either