I just wanted to share this with my fellow MacRumors brethren as a way to save a few bux. I'm gonna keep my existing iPhone 4S and switch to T-Mobiles pre-paid unlimited Talk, Text, and 4G for $49.99/mo. SIM will cost $6.99. T-Mobile seems to have great service here in Honolulu so it seemed like a no brainer for me. And the phone support dude assured me that T-Mobiles 4G is compatible with my iPhone. I just hope they don't increase the cost of their pre-paid unlimited 4G plan any time soon.