SIM cards come in different sizes. The first SIM cards were the size of a credit card. They were very big. Over time, they became smaller. The next size was the mini-SIM. It was a lot smaller. After that came the micro-SIM. This was even smaller. Today, most phones use a nano-SIM. It is the smallest size. Some new phones do not use a physical SIM card at all. They use an eSIM. An eSIM... https://egyptdata.site