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Flash TWRP with phone already rooted

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dn.34

New member
Jan 26, 2021
1
1
I have an ATT LG V40 on android 8.1. The phone is already rooted and has magisk installed. I have been unable to get TWRP installed so I can flash a custom rom. It seems that being on android 8.1 is causing issues, but I am not really sure. I followed this guide: https://forum.xda-developers.com/t/twrp-lg-v40-judypn.3970111/ and when I send the comand to flash TWRP in the command window is says the flash is finished and my phone boots up, but it doesn't seem to do anything. Any help would be greatly appreciated, thanks.
 
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SMcC2

Senior Member
Feb 22, 2014
282
138
Texas
OnePlus 6T
Are you certain that you're booting in to recovery? Many phones have an advanced reboot menu option on the developer settings. If yours doesn't I recommend an app like Simple Reboot.
If you're not certain that it's installing the recovery correctly have you just tried installing TWRP.zip from Magisk?
 

AsItLies

Senior Member
Nov 4, 2009
1,191
474
tucson
Google Pixel 3
I have an ATT LG V40 on android 8.1. The phone is already rooted and has magisk installed. I have been unable to get TWRP installed so I can flash a custom rom. It seems that being on android 8.1 is causing issues, but I am not really sure. I followed this guide: https://forum.xda-developers.com/t/twrp-lg-v40-judypn.3970111/ and when I send the comand to flash TWRP in the command window is says the flash is finished and my phone boots up, but it doesn't seem to do anything. Any help would be greatly appreciated, thanks.

Which 'command', specifically, are you typing in when you say you are 'when I send the command to flash twrp'? The only command in those directions are to boot twrp, not flash it.

After you boot it, then you need the advanced section so you can recovery ramdisk, which will inject twrp into the current boot partition (and it keeps boot intact).

If you want to use current aosp roms, then follow the 'metadata' sections as you'll need that version of twrp for those roms.

cheers
 

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    I have an ATT LG V40 on android 8.1. The phone is already rooted and has magisk installed. I have been unable to get TWRP installed so I can flash a custom rom. It seems that being on android 8.1 is causing issues, but I am not really sure. I followed this guide: https://forum.xda-developers.com/t/twrp-lg-v40-judypn.3970111/ and when I send the comand to flash TWRP in the command window is says the flash is finished and my phone boots up, but it doesn't seem to do anything. Any help would be greatly appreciated, thanks.