Will still be unlocked??

[ChC13]

Hi, I want to upgrade the version of the phone(SII-TMobile) I have it unlocked, so I can use it on any carrier here in Mexico, my question is if I upgrade the phone in the KIES program, will my phone lost the unlocked type? or it does not matter at all? Do I have to back up all my files that I have on the phone?

Thanks!

 

[HNNNNNGHHH]

I'm pretty sure you'll retain the unlocked trait as OS upgrades don't usually affect the status of your phone regarding carrier locking.