Replace iPhone 4 Antenna = iPhone 4 on T-Mobile 3G?

[Mastermrz]

Okay, so this idea came to my mind one day. You know how the iPhones antenna has a different frequency than T-Mobiles? What happens if we were to replace that and have an antenna that works on T-Mobiles 3G and now T-Mobiles 4G? Give me your ideas!

 

[Pocobear]

I'll give you a hint. What your asking has a lot more to it than just the antenna. IC's, xtals, and more.