Recently, I've been interested in factory unlocking my still on-contract iPhone 4S. I'd heard of various services over the past few months, but never really investigated them until recently.
After asking around on Twitter, I stumbled upon Cellular Medic — one of many services available online that claims to be able to factory unlock the iPhone for a fee.
I was pleasantly surprised that the entire unlock process took a mere 10 minutes. I went from an iPhone 4S locked to AT&T, to a permanently unlocked iPhone 4S that's usable on virtually any GSM carrier. Take a look inside for a video walkthrough documenting the experience...