ALSO - BEFORE YOU DO ANYTHING, if you are CURRENTLY on 3.1.2, using the phone that Apple just replaced, JAILBREAK IT FIRST!
Use blackra1n, and jailbreak/unlock it.
THEN, if you choose to, you can then use PwnageTool for Mac or sn0wbreeze for PC, create a custom IPSW/FirmWare, and then use that to update to the new 3.1.3 created in either of the above applications.
02-08-2010 10:03 AM