**Anatomy of a SIM Card**
**Anatomy of a SIM Card** Let’s break down what’s stored inside that tiny chip: 1️⃣ **ICCID (Integrated Circuit Card Identifier)**: – A **19-20 digit serial number** etched into the SIM. – Example: `8944 50 1234567890 1` → *Country code (89), Network code (44), Unique ID, Checksum*. 2️⃣ **IMSI (International Mobile Subscriber Identity)**: – A **15-digit […]