iPhone 4 IMEI / Buying Overseas
I have an iPhone 2G and got it before AT&T forced all smart phones into a data plan. I live and work surrounded by Wifi and I do not need to pay $15 +tax+surcharge ($30) a month for data, I rather get unlimited Text.
Now I have two questions:
1) I am not sure if is illegal, but is there any way to use the IMEI of my iPhone 2G on an unsubsidized iPhone 4?
2) I am traveling overseas soon and where I am going they sell unlocked iPhone 4s, If I buy that iPhone 4 there does AT&T going to know that I have a smart phone?
Thanks in advance,
P.S Please note that I am not debating whether or not is worthless to have smart phones without data plan. Every individual has his/her own circumstances. $30 USD a month for 2 years is a lot of money for a service that I am not going to use.