iphone 5 16gb gevy unlock any operator sim use properly

colour black, device internal 16gb data storage, camera 8 megapixel.
it has no spot on whole body, no scratch or no problem at all.
the phone stands on latest ios version
total used 5 month in abroad
brought from abroad. accessories== charger, data cable and headphone.
if u know whats the gevy unlock plz then call me .