What is SIM

SIM means Subscriber Identity Module. SIM founded on 1991 and founder “Smart card maker Desace and Deverent” SIM has important data memory like as subscribe, pin, user data phonebook, network identification details.

SIM Size

1991 – Like as credit and debit card.
now – SD Card size

PIN

Pin is personal identification number. User can secure sim and there data like as phonebook, messages, network identification with a pin number to misuse.

PUK

If you entered tree time wrong pin then your sim will be temporary block. To unblock your sim, contact customer care executive of telecom service provider. If you enter 10 time wrong PUK then your sim will be permanently block.

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