Vivo Y12s (2026)Boot Error Fix 100%

 When power on vivo y12s ( vivo 2026) alert message:

Reminder:

MD authentication failed. Please download signed MD Image (..verified..Img)

For fix problem, please follow step by step 

1-Need your device unlock Bootloader via any tool but for now i unlock bootloader with Unlock Tool 

When done unlock bootloader, Please go to Vivo Support System Update vivi Y12s or any model allow your device. By download Zip rom file.

And then just Copy Zip rom file to SD card

After Copy Zip rom file to SD card please put it to your device 

Continue step try make your phone into Recovery mode 

 

When your phone stay in  Recovery mode choose install file Zip from SD click install and just wait until it complete, When done pone will reboot it's mean that Successful fix your problem,

                                         Please follow full step 

Tool Link Free DOWNLOAD 

Link ROM Vivo Y12s  DOWNLOAD HERE

Posted in: FIX SOLUTION,Unlock