So we're clear: Updating an unlocked phone will lock it?

[zendavis]

I want a simple confirmation on this. Any further help or elaboration would be much appreciated. Thank you!

 

[iMarilina]

I want a simple confirmation on this. Any further help or elaboration would be much appreciated. Thank you!

Depends on how you update it.

If you update it by having made a custom ipsw and thus maintaining the baseband, then you can re-unlock it.

If you update / restore it via itunes by just hitting the update or restore button, then yes you will make it unlockable.

If you need help feel free to message me ,

I will need to know what iphone you have and what ios and what baseband (Settings - general - about - modem firmware) so I can give you instructions.