Hey,

I have a 3GS iPhone thats on 4.1 right now, it's jailbroken and unlocked on 6.15.00 baseband.

If I use sn0wbreeze/pwnagetool to get it up to 4.3.1 can it still be unlocked with ultrasn0w? I have read some things saying that ultrasn0w doesn't work on 4.3.1?

Another question I have is whether it's possible to still install baseband 6.15.00 on a phone running 4.3.1 stock firmware?

Thank you guys