What are the reasons for SIM card replacement? A SIM card replacement is done only on the following reasons; SIM Card Lost or Stolen SIM Card Damaged or worn out SIM Card Blocked (PUK or PIN Blocked) SIM Card Error (i.e. insert SIM or Invalid sim shows when inserted in the phone) Related articles Where can I do a SIM replacement? What information is required when doing a SIM card replacement? Wowi SQ733 3G. Phone Features. What is a SIM replacement? How do I know if I am eligible for a credit loan?