SIM stands for Subscriber Identity Module. The tiny SIM card is mandated on GSM and LTE networks and identifies you to the network.
A SIM card is what holds your cellular plan and number. Swapping your SIM into a new phone or device moves your service and phone number to that new device.
SIMs come in a range of sizes – Full-Size is extinct, but Mini-SIM, Micro-SIM, and Nano-SIM are all in common circulation.
There are also eSIMs which are built into the device itself are not removable.
Mobile Internet Resource Center (dba Two Steps Beyond LLC) is founded by Chris & Cherie of