You can find here a cool article about how to upgrade an iPhone to firmware version 3.0.
What you need to know:
Step 1: Check if you own a 3G iPhone. If you’re on EDGE (as I am): sorry. Tethering does not seem to work with EDGE phones.
Step 2: Check to see if AT&T is your carrier. If it is: sorry. AT&T will not let you tether.
What you need to know:
Step 1: Check if you own a 3G iPhone. If you’re on EDGE (as I am): sorry. Tethering does not seem to work with EDGE phones.
Step 2: Check to see if AT&T is your carrier. If it is: sorry. AT&T will not let you tether.
