Can my SIM card be hacked and used remotely?

Smart card technology protects SIM cards, making them very secure and virtually impossible to hack or clone.  Only someone physically possessing a SIM card can use it, so no one can make fraudulent calls remotely with your SIM.  If your phone is lost or stolen, immediately notify your mobile service provider, who will block your SIM card and prevent anyone from using your mobile phone to make calls under your subscription.