So here's some background: I currently own an iPhone 3G which I bought the day it came out and according to AT&T I won't be able to upgrade until 3/10/10. My brother has an iPhone 2G and is eligible for an upgrade. He can't afford the 3G S right now so he's gonna let me use his upgrade now to get the 3G S, then come March, he'll use my upgrade So here's my question: Since his line will be upgraded, his data plan will go from $20 to $30. On June 20th, can I call AT&T and tell them the following story about my brother's line?: "I sold my 3G S to my brother and also go a 2G iPhone in return. Can I dump the $30 data plan and use the $20 plan?" Will my plan work? Thanks in advance.