MacWorld Senior Editor Jason Snell is reporting that Sprint plans to offer the iPhone 4S with its micro-SIM slot unlocked, and that Verizon will remove the carrier lock from any iPhone 4S if the customer has been with them for 60 days or more in good standing (and requests an "international unlock"). Apple itself sells the iPhone 4 and 4S (along with 3G iPad) with the micro-SIM "factory" unlocked, but U.S. carriers generally put a "carrier" lock on them to ensure customers don't switch networks easily.
