SIM card (Subscriber Identity Module)

A SIM card, or Subscriber Identity Module, is a small chip used in mobile phones that connects the device to a mobile network. It stores essential information, such as your phone number, network details, and contacts, allowing you to make calls, send texts, and access mobile data. When you insert a SIM card into a phone, it authenticates your identity to the network, enabling services specific to your account. Essentially, the SIM card acts as a bridge between your phone and the telecommunications provider, facilitating communication and connectivity while maintaining your account security.