Maxcom MM821BB Manual page 41

Network setting
Your mobile phone provides network selection
and preference selection. Please follow the hints
to perform corresponding functions.
Safety setting
²
SIM card safe setting: SIM card PIN1 code： To
enter PIN of SIM card. If password protection
function, the screen would display "input SIM
card PIN" when power on. The password would be
covered by "*". PIN code can be given while
you get SIM card from network operator.
SIM card PIN2 code
special function (like billing call offered by
network).
SIM card
SIM card PUK code is necessary for changing
： The PIN which is necessary for using
PUK and PUK2 code（8 char）
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