Basic Functions; Power - Maxcom MM821BB Manual

a year for a long time battery electricity under the
environment the quantity consume O Fu, and may cause can
not by hand the machine went together with at first travel
charger to refresh for battery.Suggest to refresh every three
months.
Basic function
Turn on the phone
Hold the red button to switch the phone on or off.
You may see one of the following information after power
on:
SIM card is lost or insert incorrectly；
SIM card is damaged or invalid
If SIM card is available but protected by PIN code, it would
display PIN:
Input PIN code and enter.
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