If you're shopping for a new iPhone and going with a prepaid plan sounds right for you, you might want to consider Virgin Mobile USA. They just began offering the iPhone 5c and 5s starting today, and they're selling them for $100 less than you'd pay at an Apple store.
Virgin Mobile USA - a subsidiary of Sprint - offers prepaid calling plans for as little as $35 per month. All plans come with "unlimited" data (capped at 2.5 GB per month of "high speed" 4G data - after that you drop to 3G speeds) and unlimited messaging; $35 gets you 300 anytime talk minutes. $45 gets you 1,200 minutes per month, and $55 gets you unlimited talk time.
The iPhone 5c is available from the Virgin Mobile web site in 16 GB and 32 GB versions for $449.99 and $549.99 respectively; the iPhone 5s is available in 16 GB, 32 GB and 64 GB versions for $549.99, $649.99, and $749.99 respectively.
As a Sprint subsidiary, Virgin Mobile sells CDMA-equipped iPhone models - but unlike Verizon's iPhone 5 models, the SIM tray remains locked to Sprint's network. Virgin Mobile customers seem to have widely varying experiences on getting their devices unlocked to work with other GSM-based carriers' SIM cards, so if you're thinking about buying one to get a cheap unsubsidized phone that will work internationally or with AT&T or T-Mobile, you may run into trouble.
Apple's first popular iPhone with a 4-inch in-cell display, LTE 4G, and BT 4.0 LE. Fun features include:
Apple's current flagship iPhone with a 4-inch in-cell display, LTE 4G, and BT 4.0 LE. New features include: