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 worned 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 What is the information required when doing a SIM card replacement? What is a SIM replacement? Where can I do a SIM replacement? How do I block unwanted callers on my smartphone? How does the Magic Voice service work?