Alcatel VFD720 dm-verity disable - GSM-Forum

danieljoz · 02-28-2019, 12:49

Hi!
This phone has separate system and vendor partitions which are verified with dm-verity. I want to add Polish strings to apks/framework.
So I tried to disable veryfying of vendor and system partition (by editing fstab in boot.img), but there's only fstab.enableswap file available, which doesn't contain system/vendor mountpoints.
Later I found fstab.mt6739 on the vendor image, in /etc, and it had the desirable mounts. But after removing 'verify' flag, the phone still keeps restarting on android logo (only if system was modified).
I've also noticed, that changing anything in vendor image doesn't take effect (tried removing vodafone apps, changing strings in an apk). Is it possible that vendor partition is somehow bypassed?

PS I'm flashing the firmware with xxxxxxx box.

**Brka** · 02-28-2019, 22:35

let me try to explain this case as short as possible :

if you edit anything, you will break dm-verity
without insecure boot or unlocked bootloader.

so, without unlocked bootloader and eventually root,
hardly possible to do anything related to system modding.

b.r.
Alex

02-28-2019, 12:49	#1 (permalink)
danieljoz Insane Poster Join Date: Apr 2017 Posts: 87 Member: 2706270 Status: Offline Thanks Meter: 4	Alcatel VFD720 dm-verity disable Hi! This phone has separate system and vendor partitions which are verified with dm-verity. I want to add Polish strings to apks/framework. So I tried to disable veryfying of vendor and system partition (by editing fstab in boot.img), but there's only fstab.enableswap file available, which doesn't contain system/vendor mountpoints. Later I found fstab.mt6739 on the vendor image, in /etc, and it had the desirable mounts. But after removing 'verify' flag, the phone still keeps restarting on android logo (only if system was modified). I've also noticed, that changing anything in vendor image doesn't take effect (tried removing vodafone apps, changing strings in an apk). Is it possible that vendor partition is somehow bypassed? PS I'm flashing the firmware with xxxxxxx box. Last edited by Brka; 02-28-2019 at 22:29. Reason: removed boxes

02-28-2019, 22:35	#2 (permalink)
Brka Moderator Join Date: Jun 1999 Location: Serbia Age: 48 Posts: 8,207 Member: 163 Status: Offline Thanks Meter: 7,785	let me try to explain this case as short as possible : if you edit anything, you will break dm-verity without insecure boot or unlocked bootloader. so, without unlocked bootloader and eventually root, hardly possible to do anything related to system modding. b.r. Alex __________________ Always press THANKS button if my post was helpful! Please DO NOT send me PM's for help, You can ask for help on forum Do not post THANKS posts - use thanks button ! ALWAYS use SEARCH button before posting!