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04-15-2011, 12:03 AM #1Upgrade original iPhone (edge only) with 3GS from eBay
We have an old iPhone with the unlimited data plan. We are thinking of buying a 3GS and pop the old sim card in it. I know that AT&T knows when you are using an iPhone but will they also know that it was updated?
04-15-2011, 12:17 AM #2
Some people say that going from 2g unlimited and putting it in a newer iphone somehow tricks the system to give you 3g unlimited still.
04-17-2011, 02:19 PM #3
If you have an unlimited plan you are grandfathered in to the unlimited plan as long as you have an iphone, no matter how many times you upgrade.