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20. Appendix
20.1. Errors, Error Messages
The device does not turn on
If the battery voltage is very low, the device may not turn on.
Charge the battery and then try to turn it on again.
The call is not ringing on this phone
Check Call settings> SIM1 / SIM2 call settings> Call divert to
see if no call forwarding is activated.
No SIM
Be sure to insert the SIM card correctly. If the SIM card is
properly inserted and it still does not detect the device,
please contact your service provider.
No service
If you are in an area where there is no network coverage, "No
service" appears in the display and you can not make and
receive calls.
Only Emergency Calls
If you are within the coverage of your own network but within
the coverage of another network, you can only make an
emergency call.
Invalid SIM
The SIM card is locked or defective. Contact your network
service provider.
