How to update IOS when usins GEVEY sim on iphone5?

I unlocked my iphone with GEVEY sim and that man (who unlocked my phone) said should'nt update your OS bt now i want to update my ios what to do anybody knows it

If its been unlocked then it will be safe to update the iOS, it needs to be done over a Wi-Fi connection, or downloaded onto a pc or mac via iTunes.

Not sure what happens if you had the phone jailbroken

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