Upgrading or repairing the EROM (FOTA) in phones CID 49 or CID 51 with Phone XS

[juelpatwar]

i cant flash anything :( XS++ just freezes.

[rahulraj]

i cant flash anything :( XS++ just freezes.

Which phone? What version of phone software? Which version of XS++?
Actually I am building up courage to use XS++ on my phone to circumvent "operation failed" problem.. so just trying to do as much research before I begin... don't want an expensive brick :(..

Thanks,
Rahul