When I first bought my iPhone 5, it was supposed to be factory unlocked, however, it wasn't. I gave my phone to the seller and he 'unlocked' it a day later. There was no jailbreak or any Cydia apps whatsoever. I jailbroke the phone a week later. Recently, I wanted to update to iOS7, but didn't want to lose my unlock. So I check to see if my phone is factory unlocked via IMEI sites and one said 'unknown', whereas another stated 'locked'. Remember, there were no Cydia apps and I had jailbroken the phone myself after the initial unlock. So is it safe for me to update to iOS7 or will I lose my unlock?