1. Is it necessary to return the SIM card after completing the contract cancellation? May 25, 2020 08:42 No, it is not necessary to return the SIM card. After contract termination, please dispose of it. Related articles 3. How to cancel my contract? 2. I have just received my sim package, but it doesn't work on any device after completing the necessary settings. Can I get another sim card? 1. How to contact the Customer Support Center? 4. What is MNP? And what is the procedure of changing networks from other carriers to JP SMART CALL? 3. My documents are not eligible for registration at the document screening step. Can I cancel the purchase and get a refund?