Apple is now selling the unlocked GSM version of the iPhone 4 for a mere $649. Starting today you can pick up an unlocked 16 or 32 GB GSM iPhone 4 from the Apple online retail store. The 16GB version costs $649 where the 32GB version sells for $749. This iPhone will work on any GSM supported network in the world. Customers in the US can buy these from AT&T and T-Mobile. However, if you use an iPhone on T-Mobile's network it will use the EDGE network which is dramatically slower than 3G. So to wrap this up, what do you think? Are you getting one of these unlocked iPhone 4's? Leave a comment down below!