Phone Lock; Pin And Puk; Locking The Keypad - Huawei G3510 Manual

Phone Lock

The phone lock protects your phone from unauthorized use. By
default, the phone lock function is disabled. You can change the
default phone lock code (1234) into any numeric string of four
to eight digits.
Do remember your phone lock code. If you forget it, contact
the service center.

PIN and PUK

The personal identification number (PIN) protects your SIM
card from unauthorized use. The PIN unblocking key (PUK) is
used to unlock the blocked PIN. Both the PIN and the PUK are
provided with the SIM card. For details, contact your service
provider.
If you enter wrong PINs for a specified number of times
consecutively, the phone asks you to enter the PUK.
If you enter wrong PUKs for a specified number of times
consecutively, the SIM card becomes permanently invalid. In
this case, contact your service provider for a new SIM card.

Locking the Keypad

You can lock the keypad by pressing and holding in
the standby mode. To unlock the keypad, press
(Unlocked) and in succession.
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