Maxcom MM-820 Manual page 29

SIM.card.error
SIM.card.damaged
SIM.card.incorrectly.installed
SIM.card.dirty.or.damp
Failure.to.connect.to.network
SIM.card.invalid
No.coverage.of.GSM.service
Signal.too.weak
Weak.signal
Too.far.from.base.station
Network.congestion
Echo.or.noise
Regional.problem.from.bad.network relay Hang up and redial . This may
Failure to add a contact
Phonebook memory full
Failure.to.set.a.function
Function.not.supported.or.
subscribed.from.network
Careandmaintenance
Your unit is a technically advanced product and should be treated with the
greatest care . Negligence may void the warranty
• Protect the unit from moisture . Rain/snowfall, moisture and all types of
liquid can contain substances that corrode the electronic circuits . If the unit
Check the condition of the SIM card . If
it is damaged, contact the network
operator .
Check the installation of the SIM card .
Remove the card and reinstall it .
Wipe the contact surfaces of the
SIM card with a clean cloth .
Contact the network operator .
Contact the network operator .
See Weak signal below .
Try again from another location .
Try calling at a later time .
switch to another network relay
Deletecontactstofreeupmemory
Contact thenetworkoperator