Hi, yes pwede yan palitan mo lang ung simcard at ilagay ang bagong sim card back to the GPP Chip... I suggest don't update your IOS version, hindi na nya madedetect yung GPP chip mo and you'll need to buy a new one.
Insert mo lang po ung new sim.Hi. Ask ko lang po need pa po ba iactivate ulit if ever? Or insert ko lng new sim ko thanks