
AT-Telecom
USER-MANUAL AT-B17D
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9. Appendix 1 Troubleshooting
Phenomena
Possible Causes
Unable to switch
on
Does the battery have power?
Is the battery placed correctly?
SIM failed
The SIM card is dirty. Clean it.
Reinstall the SIM card.
The SIM card is damaged.
Replace it.
Poor signals
Check the signal strength icon
on the screen. If the icon
contains 3 bars, it indicates the
signal is OK. If below 1 bar, the
signal is very poor.
Unable to dial out
Strong interference exists
around you.
Maybe you have activated the
call restriction function.
Maybe you have activated Line 2
but your network operator does
not provide this service for you.
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