Do yourself a favour and keep the hell away especially if you have a 3gs no way back no way to update 4.3 if true weeks/days away do a search look at the probs 4.2.1 is a buggy piece of crap.

updating to BB 6X is just stupid, its ipad firmware!

Do yourself a favour look at the WARNING!

WARNING:

YOU DO THIS AT YOUR OWN RISK! PLEASE UNDERSTAND THE CONSEQUENCES OF UPDATING TO 06.15.
There is no way to come back down from 06.15, and there’s no hiding the baseband version from Apple. You’ll be voiding your warranty in a very obvious way.
If some future baseband comes out with a critical fix, you won’t be able to update to it if it remains down in the 05.xx sequence (then again, you wouldn’t update to it if you wanted to keep your unlock anyway).
Starting with FW 4.2.1 if you have 06.15 on your iPhone you won’t ever be able to restore to stock firmware (it will fail). You’ll need to only restore to custom IPSWs (then again, if you’re unlocker you should already be doing that)


Dev Team warned you but no one READS.

AGAIN UNLESS U HAVE NO OTHER CHOICE STAY THE F#5K AWAY FROM IT

if u dont listen dont PM me.