None of you are answering his question - he heard some idea that apple might lock your phone if you were running iOS 6 and not a dev. He has now downgraded to iOS 5, and wants to know if his iPhone might still be locked.
In answer - almost definitely not. In fact, I've never heard of someone's phone being locked like that, ever. I'm pretty sure you'd be fine sticking with iOS 6 to be honest, mate.
Also, to Mr. Fancy Developer who thinks he's better than this fellow because he can program - I bought a registration on eBay, for $4.50. I've never had a problem with the iOS beta, and if I did, I would handle it myself without complaining or posting. Yes, there are people who should stay away from the beta, but I, and I'm sure plenty of other people, would appreciate it if you wouldn't make these generalizations that you have to be able to write code to run this beta. We aren't hurting you in any way - in fact, we're helping. More user data for Apple. Lay off with the haughty ******** - you're not better because you're a developer.