IOS 7 UPDATE: Can I still update my unlocked iPhone?

So I went to a friends phone retail store he unlocked my iPhone through a company wich gives u the code to unlock and then he connected it wit Net10 (AT&T). Pretty sure it was a legal unlock MY QUESTION IS: can I still update my iPhone 4S to IOS 7 even though my iPhone is unlocked? Because if I do I'm worried my carrier settings wuld erase and I wouldn't have a line with Net10 any more.

If you update using iTunes on a computer there will not be a problem. If its unlocked it will stay unlocked.