A supporter personality module is a removable brilliant card for cell phones. SIM cards store the necessary data to distinguish the cell phone. It additionally contains information needed for voice encryption to settle on tuning in on decisions exceedingly difficult (with the exception of when the remote transporter itself is doing the listening in).
In this manner the client ID (and individual number) is attached to the SIM card and not to a specific cell phone. This takes into account a consistent trade of a similar SIM card between various GSM cell phones.
SIM cards likewise fill in as capacity for SMS messages and the client’s contacts. Current SIM cards can hide away to 250 name/number sets and up to 50 SMS instant messages.
The SIM card can’t store different numbers per contact or other more mind boggling data. This actually intends that assuming you duplicate your contacts data from the telephone memory to the SIM memory, contacts become separated into however many sections as there are numbers for every individual contact and disposes of the other data.
All GSM telephones and most iDEN telephones require a SIM card to work.
There are particular sorts of telephones (CDMA, TDMA, AMPS) that don’t utilize a SIM. All things being equal, the necessary information is customized straightforwardly into the telephone.
Replaceable SIM cards come in four standard sizes:
Full-size (85.6mm × 53.98mm × 0.76 mm)
Smaller than normal SIM (25mm x 15mm x 0.76mm)
Miniature SIM (15mm x 12mm x 0.76mm)
Nano-SIM (12.3mm × 8.8mm × 0.67mm)
The eSIM or Embedded SIM comes in a single size:
eSIM (6mm x 5mm x <1mm) Non Removable