iPhone Update to iOS 7

[Rmares90]

What will happen if I update to iOS 7 on my unlocked iPhone 4? I bought it for tmobile before tmobile they released the iPhone on their network. Any help would be greatly appreciated.

 

[matttye]

You'll have iOS 7.

 

[dictoresno]

its as simple as that. once carrier unlocked, always unlocked. as the previous poster said, you will just have ios 7.