Stuck in fastboot mode
Thank you so much for your contribution and giving us the appropriate T-Mobile files. However, while my bootloader is unlocked, I'm currently stuck in the fastboot. My 20d was in slot A, so I got temp root and switched the .img files in slot B, switched back to slot A to unlock the bootloader. However, whenever the device boots, it goes straight to fastboot and I can't exit it without reflashing the kdz file with LGUP. After doing that, the phone says the bootloader is unlocked, but I can't flash magisk or twrp. Did I miss a step?
TMobile G820TM unlock stuff
The files needed to unlock
https://www.androidfilehost.com/?fid=8889791610682884889
I updated the Sprint unlock files from the main post to have the TMobile files needed to unlock under the 20D January 2020 Android 10 firmware. If you are not on that firmware especially due to being updated to the April 2020 Android 10 firmware you will need to downgrade to January 2020 as April 2020 has the exploit we are using patched. You can use the PDF guide from the main post as that pretty much covers bootloader unlocking the TMobile G8 in terms of each step very well.
The KDZ for January 2020 is here towards the bottom of the page:
https://lg-firmwares.com/lg-lmg820tm-firmwares/
And here's the software you will need to get the job done:
https://www.androidfilehost.com/?fid=8889791610682884898
1. Install the LG drivers if you haven't already.
http://tool.lime.gdms.lge.com/dn/downloader.dev?fileKey=UW00120120425
2. Install LG Up
3. Install the LG Common DLL
4. Copy the UI confilg files to C:\Program Files (x86)\LG Electronics\LGUP\model\Common
5. Turn off the G8.
6. Once off hold up volume up then insert your USB into the phone.
7. Open LG Up. If you get an error message ignore.
8. Select REFURBISH in LG Up
9. Load the KDZ file by drag and drop where it says BIN file
10. Click start
11. Once the downgrade is done installing the phone will reboot. I highly recommend not putting the phone on Wifi and turning off data to avoid any chances of the phone updating.
Thanks to the many people in the Telegram chat for all the help I've gotten in unlocking the TMobile G8.
Thank you so much for your contribution and giving us the appropriate T-Mobile files. However, while my bootloader is unlocked, I'm currently stuck in the fastboot. My 20d was in slot A, so I got temp root and switched the .img files in slot B, switched back to slot A to unlock the bootloader. However, whenever the device boots, it goes straight to fastboot and I can't exit it without reflashing the kdz file with LGUP. After doing that, the phone says the bootloader is unlocked, but I can't flash magisk or twrp. Did I miss a step?