PIN2 - Personal Identification Number 2
PIN2 (Personal Identification Number 2): PIN2 is a four to eight-digit numeric code that is set by the SIM card user or the mobile network operator.
It is used as a security measure to protect specific functions on the SIM card, such as changing call forwarding settings, accessing the SIM card's additional features, or making changes to the fixed dialing numbers (FDN) list.
PIN2 is different from the regular PIN (PIN1), which is used to unlock the SIM card and gain access to the mobile network. PIN2 is typically required when accessing advanced SIM card features that have additional security requirements.
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