Carrier Switch Snapdragon

[mweinbach]

Here is the Eng Boot for the SM-G955U. I did not get this, @unitz0mbie posted it. I am just posting it here. This is instructions for how to switch carriers.

G955U1 firmware is the US firmware. It has the CSC info of each carrier but does NOT have any of the bloat or boot logos. For T-Mobile it has WiFi Calling and VoLTE. Verizon texting works with data and WiFi calling. All those carrier features work. AND It changes depending on the SIM card in your phone. So you don't need to keep flashing firmwares. I don't know for what device the G955U1 would come on. The US unlocked device has a model number of SM-G955UZKAXAA and a carrier SW version of XAA/XAA/XAA. I think this firmware is the one that they give reviewers. Gear VR doesn't work.

Thanks to @Rushstrike for going through everything with me for carrier changes.

EngBoot: https://drive.google.com/file/d/0B1tT3ufAPS4SYUVzRVZyS2pnUTA/view

EngBoot: https://www.androidfilehost.com/?fid=889764386195903885

Modified Odin: https://www.androidfilehost.com/?fid=24686680535466915

Factory Binary G955U: https://www.androidfilehost.com/?fid=745425885120731328

G955U1 Firmware: https://www.sammobile.com/firmwares/SM-G955U1/XAA/download/G955U1UEU1AQDC/167505/

G955W Firmware: https://www.sammobile.com/firmwares/SM-G955W/XAC/download/G955WVLU1AQDE/130947/
G955W Frimware: http://updato.com/firmware-archive-select-model?record=C102FC9F4BDB11E7963AFA163EE8F90B

G955U Firmware: https://www.sammobile.com/firmwares/galaxy-s8/SM-G955U/TMB/download/G955USQU1AQDE/130248/
G955U Firmware: http://updato.com/firmware-archive-select-model?record=55E89C7D4BED11E7963AFA163EE8F90B

 

[mweinbach]

How to flash G955U1:
1. Download G955U1 for your device and patched Odin.
2. Turn off phone
3. Hold down on Bixby button + power + volume down
4. open patched Odin
5. add the firmware to the AP, CSC, CP, and BL sections of Odin.
6. Plug your phone into your computer (NEEDS TO BE WINDOWS) with Odin open
7. Make sure your device is connected and recognized by Odin.
8. Click start.
9. Enjoy G955U1

 

[mweinbach]

How to change carrier:
1. Download Factory Binary, EngBoot, G955U normal, and the G955W firmware
2. Turn off phone
3. Hold down on Bixby button + power + volume down
4. open Odin v3.12.7
5. add the Factory Binary to the AP section of Odin.
6. Plug your phone into your computer (NEEDS TO BE WINDOWS) with Odin open
7. Make sure your device is connected and recognized by Odin.
8. Click start.
9. One the phone reboots run the ADB command, adb reboot bootloader
10. Open modded Odin and flash the EngBoot
11. Click start
12. Once the phone reboots type the command adb reboot bootloader
13. Put the HOME_CSC of the G955W firmware into the CSC part of Odin (unmodded)
14. Click start
15. Open IME setting on Factory Binary
16. Type in *#243203855#
17. Select XAC
18. Click install
19. Wait for phone to reboot
20. Once it does open terminal and type in adb shell
21. Then type in echo "XXX" > /efs/imei/mps_code.dat
22. Type in exit into adb shell
23. Type in adb reboot bootloader
24. Flash the G955U firmware of your choosing without Userdata. Also make sure to flash the non-home CSC
25. Enjoy your new carrier!

CSC Values (replace on of these with the "XXX" in step 21):
BST Boost
VZW Verizon
ATT ATT
USC US Cellular
ACG C Spire
TMK MetroPCS
VMU Virgin Mobile
TFN Tracfone
XAS Sprint
TMB T-Mobile
XAA Unlocked US
SPR Sprint
CCT Xfinity Mobile

Don't entirely know which ones these are:
GCF World Wide
ACG Some Mid West Carriers
LRA A bunch, cant figure it out

After you do this, you can flash the EngBoot then run the command to any carrier then just reflash the original system.

 

[djhotsauce]

@mweinbach so I'm assuming since you mentioned root, this is the Engineering Boot we've been waiting for with write permission??

 

[mweinbach]

@mweinbach so I'm assuming since you mentioned root, this is the Engineering Boot we've been waiting for with write permission??

No. I need to rewrite that. I just copied this from my S8 thread.

 

[Rydah]

Wait, I flashed the unlocked firmware last week. I have zero bloat so it definitely appears I'm running the firmware but my CSC shows as TMB (originally on T-Mobile firmware.) So let's say I purchased an unlocked US model and popped my T-Mobile SIM in it. Should the CSC say XAA or TMB? If XAA, I can use your guide to switch over to XAA right?

Sent from my SM-G955U1 using Tapatalk

 

[mweinbach]

Wait, I flashed the unlocked firmware last week. I have zero bloat so it definitely appears I'm running the firmware but my CSC shows as TMB (originally on T-Mobile firmware.) So let's say I purchased an unlocked US model and popped my T-Mobile SIM in it. Should the CSC say XAA or TMB? If XAA, I can use your guide to switch over to XAA right?

Sent from my SM-G955U1 using Tapatalk

TMB because the way it works is that it enables carrier CSC settings without the bloat. Switching to the XAA does nothing. It will just switch back to TMB when you put in your sim card.

 

[Rydah]

TMB because the way it works is that it enables carrier CSC settings without the bloat. Switching to the XAA does nothing. It will just switch back to TMB when you put in your sim card.

Perfect. Was already getting ready to jump off a bridge after this long day. Lol thanks bro, great thread.

Glad I'm not the only one with broken VR. (not that I wish for that, just glad it isn't just me being a noob all over again.) Hopefully they fix it.

Sent from my SM-G955U1 using Tapatalk

 

[mweinbach]

Perfect. Was already getting ready to jump off a bridge after this long day. Lol thanks bro, great thread.

Glad I'm not the only one with broken VR. (not that I wish for that, just glad it isn't just me being a noob all over again.) Hopefully they fix it.

Sent from my SM-G955U1 using Tapatalk

its disabled server side.

 

[Rydah]

its disabled server side.

Ahhh that explains it. Wonder why they'd release an unlocked model with disabilities such as a VR headset they're pushing to sell.

Sent from my SM-G955U1 using Tapatalk

 

[Rootuser3.0]

So what firmware do I need to sim unlock the s8+

 

[mweinbach]

So what firmware do I need to sim unlock the s8+

Don't quote me but G955U1 might work. You might still need to have it unlocked through your carrier.

 

[fademaydarkness]

it worked

 

[elliwigy]

So what firmware do I need to sim unlock the s8+

yes, you do need to unlock through your provider unless u r Sprint

 

[Rootuser3.0]

yes, you do need to unlock through your provider unless u r Sprint

A person on ebay did something and sim unlocked it with 00000000

I'm on xmobile and now it takes a Verizon sim which rejected it before the unlock

 

[elliwigy]

A person on ebay did something and sim unlocked it with 00000000

I'm on xmobile and now it takes a Verizon sim which rejected it before the unlock

interesting... usually u needa go through the unlock app on tmo devices

 

[Aephel]

Just flashed this on my unlocked T Mobile S8+, everything is working Wifi Calling and etc. I will have to wait until next week to try a Verizon SIM to see if that works.

 

[trebills]

Thanks for the post, but, is there anyway we can get a mirror for these files? sammobile is garbage. Why not just use google drive?

 

[mweinbach]

Thanks for the post, but, is there anyway we can get a mirror for these files? sammobile is garbage. Why not just use google drive?

Check updato

 

[trebills]

Check updato

EDIT: Found it thanks
I am not sure what you mean. An update?