NEC D400 - Security Features; Key Lock and Security Codes Overview; PIN and SIM Lock Functions

Security
The facilities outlined in this section enable you to protect your phone from improper and unauthorised use.
Key lock 0 41
Security codes 41
PIN 1 code 41
Dial lock 42
Changing security codes 8 5 42
SIM lock 43
Call barring 4 1 43
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