As 9to5Mac noted this morning, the unlocked models of Apple’s iPhone 4S will be available in November – with no specific date given. There’s no mention of an unlocked model coming to CDMA networks Sprint or Verizon so don’t expect those anytime soon.
If you happen to travel internationally, an unlocked iPhone is vital since the micro-SIM cards can be swapped out easily to use with any carrier. Verizon also offers global plans with a SIM card.
The unlocked iPhone includes all the features of iPhone but without a contract commitment. You can activate and use it on the supported GSM wireless network of your choice, such as AT&T in the United States.* The unlocked iPhone 4 oriPhone 4S will not work with CDMA-based carriers such as Verizon Wireless or Sprint.
If you don’t want a multiyear service contract or if you prefer to use a local carrier when traveling abroad, the unlocked iPhone is the best choice. It arrives without a micro-SIM card, so you’ll need an active micro-SIM card from any supported GSM carrier worldwide. To start using it, simply insert the micro-SIM card into the slot on your iPhone and turn it on by pressing and holding the On/Off button for a few seconds. Then follow the onscreen instructions to set up your iPhone.