Why lock your sim card

Add some extra security to your SIM card by locking it with a PIN. Here's how to do it! Score a saving on iPad Pro (): $ off at Amazon We may earn a commission for purchases using our links. Learn more. Source: Christine Romero-Chan. Got a new phone that you want to activate or an old phone that you want to start using on a different provider network? That means it's time to activate your SIM card. Learn more about how to do that with this simple guide to SIM activation. A super SIM card is a type of mobile phone card that allows the mobile phone user to use multiple phone numbers and store all related information on one card, in one phone. Its capabilities include recognizing multiple phone networks and ca.