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163 Sendo X User Guide
20
Troubleshooting
‘SIM failure’ is displayed on my phone The handset is locked to a network and a SIM
from another network has been inserted into
the phone
Remove the SIM and insert the correct network
SIM. Contact your service provider.
SIM card is inserted incorrectly or missing Check that the SIM card is inserted correctly and
press
p.
SIM card is damaged or dirty Visually check the SIM and clean the gold-
coloured contacts with a dry cloth. Try again.
Poor display Low temperature Ideally the phone should be kept at room
temperature. Move to a warmer place and allow
the phone to warm up. Try again.
High temperature Ideally the phone should be kept at room
temperature. Move to a cooler place and allow
the phone to cool down.
Power Saving settings Check the phone is set up with a bright enough
display and that the display timeout is not too fast.
See Programs>Setting>Power Management.
Wallpaper settings If you’ve added your own wallpaper, check that
the colours do not clash with the text colours used
on screen as this could make it difficult to
distinguish.
Can’t connect to the network Weak signal Move into an area of better coverage. If you are
inside try moving closer to a window.
Invalid SIM card Contact your service provider.
‘Network denied’/’No network’ Try reselecting the network. Switch the phone off
and on again.
Operating band is incorrect Check the band you are operating on. North
America operates on 1900, but Europe and Asia
both operate on 900/1800 band. Check with
your service provider.
Can’t make or receive calls Weak signal Check that the service provider name is displayed
on the screen. If not, try to reconnect to the
network or move into an area with a better signal.
Phone is switched off
Press
p.
Problem Possible Cause Possible Corrective Action
169


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