A prepaid SIM card is one without preloaded credit, such as an international SIM card. You can top up your credit balance with the service provider from time to time and use it occasionally.

Read: How to Register Prepaid Phone Card Here are several ways you can check whether your prepaid SIM card has been registered or not based on the phone provider.

If you find yourself in a situation where you just can't remember your own number, you can easily figure it out on an iPhone or Android. Here's how.

How do I find it? How to find the SIM number on your iPhone: What is a SIM number? Your iPhone’s SIM number is technically called the ICCID, which stands for Integrated Circuit Card Identifier.