SIMkorteissa
SIMkorteissa, often referred to as SIM cards, are compact integrated circuits that securely store the International Mobile Subscriber Identity (IMSI) number and its related key used to identify and authenticate subscribers on mobile telephony devices. The acronym SIM stands for Subscriber Identity Module. These cards are a crucial component of cellular networks, enabling devices to connect to a specific operator's network.
SIMkorteissa come in various sizes, with the smallest being the nano-SIM, followed by micro-SIM and mini-SIM.
Beyond basic identification, SIMkorteissa can also store contact information, text messages, and other data, though modern