I have a 3GS but my eligibility date is not until 2/20/2011. My wife's 3G is eligible for a discount. I plan to do the following: 1) Pre-order iPhone 4 on June 15th. 2) Receive iPhone 4 at my house on June 24th 3) Plug iPhone 4 into my Mac and activate it on MY line 4) Take the SIM out of my 3GS and put my wife's SIM into the 3GS 5) Hope that I'll be activated on iPhone 4 and she on my old 3GS 6) Sell my wife's 3G Hopefully, no need to call Apple or AT&T in this whole process. Am I on track here?