that's a completely different kind of upgrade, i thought you meant software
Do they care about S-OFF?? because if you intend on going S-ON, then I would highly recommend a 1.xx ruu, nothing higher.
because going from S-Off to S-On on hboot 1.55+, has been known to trigger "tamper detected - rebooting" and TAMPERED is back in bootloader screen.
Pretty sure they check the bootloader for S-ON, ***TAMPERED*** and ***LOCKED***
Is it just the 1.55+ Hboot that throws the tampered when locked?
If so Can I flash the 1.54.401.5 Hboot from Firewater and proceed like that?
Can't do the 1.44, My PC is running 8.1 and I've not played with Linux since 2009