[Guide] Convert to Global [WIP]

[mattie_49]

Thanks. Since TMO has released the A11 update, I think I use that to return to stock, and then carry out the process above.

Doesn't work to well to restore partions but backs them up great; fastboot and fastbootd do however restore perfectly.

 

[mattie_49]

Awesome. Thanks.

Since me posting this I tried flashing global and didn't get signal. This is since A11 Verizon update. So might just be my carrier. Did however work on A 10 perfectly

 

[sjgoel]

Since me posting this I tried flashing global and didn't get signal. This is since A11 Verizon update. So might just be my carrier. Did however work on A 10 perfectly

I also tried to convert again to global, I flashed the stock fastboot ROM (11.0.0-GLOBAL-OnePlus8Oxygen_15.O.30_OTA). Flashing went well but phone ended up on the bootloader screen. Tried the earlier A10 global ROM versions but with same results. So am forced back on T-Mobile.

Do not know why when the same procedure & same global ROM had worked perfectly few weeks ago?

 

[mattie_49]

I also tried to convert again to global, I flashed the stock fastboot ROM (11.0.0-GLOBAL-OnePlus8Oxygen_15.O.30_OTA). Flashing went well but phone ended up on the bootloader screen. Tried the earlier A10 global ROM versions but with same results. So am forced back on T-Mobile.

Do not know why when the same procedure & same global ROM had worked perfectly few weeks ago?

Are you making sure to go into recovery after flashing global and doing a full wipe? Factory reset . Will not boot to anything but bootloader if not.

 

[sjgoel]

Are you making sure to go into recovery after flashing global and doing a full wipe? Factory reset . Will not boot to anything but bootloader if not.

No, I did not do that.
Just to confirm, after flashing recovery, I need to go to the device recovery (which shows up in English & 2 other languages) & do a full wipe, then reset?

 

[mattie_49]

No, I did not do that.
Just to confirm, after flashing recovery, I need to go to the device recovery (which shows up in English & 2 other languages) & do a full wipe, then reset?

That's definitely your problem. Flash global rom,get to recovery one way or the other after it's finished and yes it's the screen your speaking of. English,advanced. Wipe data,factory reset. Have to wipe data when switching from one build to the next. Stinks to set-up again but that's unfortunately what has to happen..

 

[sjgoel]

That's definitely your problem. Flash global rom,get to recovery one way or the other after it's finished and yes it's the screen your speaking of. English,advanced. Wipe data,factory reset. Have to wipe data when switching from one build to the next. Stinks to set-up again but that's unfortunately what has to happen..

Great, and thanks.
I am on T-Mobile Android 11. Which global version should I flash? 11.0.2.2. seems to be the latest, or does not matter as it will upgrade OTA automatically.

 

[mattie_49]

Great, and thanks.
I am on T-Mobile Android 11. Which global version should I flash? 11.0.2.2. seems to be the latest, or does not matter as it will upgrade OTA automatically.

Get the latest a11 version you can. And local upgrading will probably break data. So after you flash . Just stay where your at. You can try taking ota after flashing,if it breaks data. You just have to start over.

 

[sjgoel]

Get the latest a11 version you can. And local upgrading will probably break data. So after you flash . Just stay where your at. You can try taking ota after flashing,if it breaks data. You just have to start over.

Thanks a ton. Will try & report.

 

[mattie_49]

Thanks a ton. Will try & report.

It will indeed work

 

[sjgoel]

It will indeed work

Worked finally. thanks.

 

[2matos]

when im at the recovery screen i dont have advanced. Wipe data,factory reset. my advanced only shows reboot to fastboot and recovery again

 

[mattie_49]

Worked finally. thanks.

Thought that was your issue. Good deal

 

[sjgoel]

Thought that was your issue. Good deal

I tried flashing latest 11, but that did not work. So I had to MSM to 10, and then upgrade to 11. Thanks for help.

 

[geiswiz]

I am currently on TMO OP8 version 11.0.1.1 and want to convert to global since I have recently received my unlock token. I'm just wondering if I need to use the MSM tool to go to 10.5.7 or can I just do the following:

fastboot flash cust-unlock <unlock_token.bin>
fastboot oem unlock
Extract all files from fastboot rom zip (I downloaded 10.5.7 and 10.5.12 from here - https://sourceforge.net/projects/fastbootroms/files/OnePlus 8/)
Reboot to fastboot
Run flash-all.bat
A bunch of stuff will flash and phone will reboot twice
Complete setup (skip what I can to get to booted)
You are now on Global Rom and can upgrade to A11 with local upgrade or oxygen updater

Thanks!

 

[mattie_49]

I am currently on TMO OP8 version 11.0.1.1 and want to convert to global since I have recently received my unlock token. I'm just wondering if I need to use the MSM tool to go to 10.5.7 or can I just do the following:

fastboot flash cust-unlock <unlock_token.bin>
fastboot oem unlock
Extract all files from fastboot rom zip (I downloaded 10.5.7 and 10.5.12 from here - https://sourceforge.net/projects/fastbootroms/files/OnePlus 8/)
Reboot to fastboot
Run flash-all.bat
A bunch of stuff will flash and phone will reboot twice
Complete setup (skip what I can to get to booted)
You are now on Global Rom and can upgrade to A11 with local upgrade or oxygen updater

Thanks!

I'm on Verizon and best I remember if your a carrier branded device & take local upgrade or system update you will loose data. Because it flashes the global modem. You can always try though. No limit on how many times we can msm.

 

[hungmung]

I'm on Verizon and best I remember if your a carrier branded device & take local upgrade or system update you will loose data. Because it flashes the global modem. You can always try though. No limit on how many times we can msm.

I am on tmobile and took an ota update and still have data. It may be different for the Verizon model however because it's a slightly different model due to the mmwave function.

 

[mattie_49]

I am on tmobile and took an ota update and still have data. It may be different for the Verizon model however because it's a slightly different model due to the mmwave function.

And QTI telephony stuff for sure.

 

[easyto]

*** Use this at your very own risk.

***Backup your persist.img. There is a guide to fix it if needed.

*** Backup your working modem. Sometimes it is as simple as restoring it if you lose signal.

*** When flashing, you must understand the difference between fastboot and fastbootd to avoid flashing errors.

*** Backup your files in a safe place.

*** Some users are reporting that the whole thing is not working and going on a blame streak. So if you're not quite ready, please don't attempt this.




Basic Instructions: "I will test again since some users are losing signal after flashing". There is a debate whether msm and update the tmobile firmware, or flash the global. Again this is a WIP.

MSM. Here is the thread.
Unlock bootloader or re-unlock bootloader ... Enable OEM Unlock in developer options. flash token.
Fastboot

fastboot flash cust-unlock <unlock_token.bin>

fastboot oem unlock

and now your bootloader is unlocked.

Here is the t-mobile article for the 6t. same instructions for the 8 if you're new to this.
NEXT:

Link to fastboot thread
https://forum.xda-developers.com/oneplus-8/how-to/rom-stock-fastboot-roms-oneplus-8-t4084629

Download the global fastboot rom from here.

Unzip and flash all.

Link to twrp thread:
https://forum.xda-developers.com/oneplus-8/development/recovery-unofficial-twrp-oneplus-8-t4101315

If you want to root.
Boot into twrp or flash the twrp installer. TWRP 3.3.1-10 Test by mauronofrio and or TWRP 3.3.1-10 Test Installer by mauronofrio "newer ones may work"

After booting, you can flash magisk with-in twrp and you're rooted.

I have used oxygen updater to update the firmware while rooted. After the local install, open magisk and flash on the inactive slot.
---------------

If you ever want to revert, use the msm tool. Here is the thread.
https://forum.xda-developers.com/oneplus-8/how-to/op8-unbrick-tool-to-restore-device-to-t4093043

---------
Old information from the old thread is below, if you want to use it only for reference or for backing up the FP persist

---------------

Old Instructions

Here we go .....
This is fairly new and hasn't been tested so, proceed with caution. There are more knowledgable people here. This was just tested quick and it worked.

Requirements
1-Be on T-mobile firmware and update to the latest version. If you are bootloader unlocked, you mean not be able to take OTA's and you may need to reflash with MSM and update, then unlock the bootloader again. Thread Thanks @Some_Random_Username

2 - Unlock your bootloader.

3- --! IMPORTANT: Make a TWRP backup of your MODEM because we'll restore that later, why? because t-mobile sim doesn't work on the Global Modem. You can also back everything up in TWRP just in case.
If you have OTG, make the backup there so it is safe. You can restore the modem through TWRP with the OTG.

4-Backup your persist. Otherwise you may lose the fingerprint.
You'll need root.

adb shell

su

dd if=/dev/block/bootdevice/by-name/persist of=/sdcard/persist.img

Then

adb pull sdcard/persist.img

Then copy it from from Sdcard to a safe place

*** You may lose signal again if you update the global version. It is a WIP but keep your modem backed up!

With all the above:
It is simple. Download the global firmware and flash it through fastboot. Here is the thread
.. I tested with "10.5.5-GLOBAL-OnePlus8Oxygen_15.O.14" Thanks @mauronofrio

• Reboot to fastboot
• Unzip and flash-all
• It will reboot to the global firmware. "Now you won't get cellphone signal"
• Skip the setup and reboot to fastboot.
• reboot to twrp, do not flash it.

  fastboot boot twrp.img

  link to twrp thread. . I used TWRP 3.3.1-2 Test by @mauronofrio
• plug in the OTG or locate the backup and Restore the Modem" to get signal
• Reboot and you'll have signal.

To root. you can flash the patched boot located in the sourceforge folder " Patched-Stock-Boot" on this thread

fastboot flash boot filename.img

You can also flash magisk in twrp. I prefer the patched boot.

Bonus: I am running the Nolimit magisk rom Thanks @xXx
https://forum.xda-developers.com/on...gisk-rom-xxx-nolimits-11-0-speed-ram-t4088609

Thanks @Some_Ghost for testing.

hi ,I am unable to unlock the bootloader. Is there any thread for step by step

 

[hungmung]

hi ,I am unable to unlock the bootloader. Is there any thread for step by step

Instructions for it are in the op. The link right under where he says and now your bootloader is unlocked