I currently use an iPhone 5 on T-Mobile prepaid. I'm in a good coverage area (Dallas), have been very happy with data and call quality. I love not paying cell phone taxes, so I know exactly what I'm going to pay each month. I'd like to add a line for my wife, and I've always believed philosophically in the prepaid model. But there are a few perks to T-Mobile postpaid: one bill, a few dollars cheaper, free tethering and overseas roaming (don't really affect me, though). Prepaid (2 lines) - $50 + $50 = $100 Postpaid (2 lines) - $80 + taxes/fees (20%) = $96 Don't you have to pay a deposit on postpaid? Would there be other activation fees? I just don't know if it's even worth it to go into a retail store and talk to a brain-dead 20-year old so I can start paying the government $16/month. I realize these are granular points, and I don't know why, but I have no problem paying full price for an iPhone but I obsess over the monthly bill.