I update iphone 4gsm to 5 but it says i have to activate it by compatible sim how can i do this?

i update my iphone 4 gsm to ios 5 but it says sim not valid i have gevey pro sim but don't know what to do  in Nepal,

Discussion of hacked iphones is not permitted here.
Your iphone was hacked/unofficially unlocked.  It was locked back as it should be when the software was updated.

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