Before you try the Update this ROM you should know some extra aspects first:
● Must keep back-up for your personal data properly.
● The battery power should be more than 79% before starting the customization.
How to Update vivo Y15 To Package v2.5.1:
WARNING!!! ALWAYS BACKUP YOUR CURRENT ROM FIRST BEFORE YOU FLASH THIS!
- Once you have downloaded the file and saved it to your sd card, - press vol up + Power button - chose recovery mode - flash from external sd selet vivo_update.zip - done for more info visit vivo forum