Maxcom MM824 User Manual page 21

Be careful while handling the SIM Card, do not
bend it or scratch it.
If the SIM Card is not properly installed or
damaged, a message „Insert SIM Card" will appear on
the screen after switching on the phone. Make sure
the Card is properly inserted and it is not damaged,
and then switch on the phone again. If the message
„Insert SIM Card" is still there, take the SIM Card back
to your GSM network service provider to have it
replaced.
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