Sony Xperia A4 Instruction Manual page 204

Calls cannot be made from the terminal
connecting to external device such as car
navigation or handsfree device.
If calls are made several times when the
･
other party does not answer or is out of
service, the call to this number may be
disabled. In this case, turn terminal off and
on.
Map/GPS
■
Cannot set AUTO-GPS service
information.
Check if the battery level is low and AUTO-
･
GPS function stops.
If AUTO-GPS stops due to "Low-power
operation settings", AUTO-GPS service
information cannot be set. In this case, set
"Low-power operation settings" to "Not
suspend" or charge the battery.
P.162
Check if "AUTO-GPS operation settings" is
･
marked. P.162
→
Error messages
No service
●
The terminal is out of service area, or the
･
received signal is too weak. Move to a
location where radio signal can be
reached.
The docomo nano UIM card is not
･
working properly.
Insert the docomo nano UIM card in
another terminal. If this works, it is
probably the terminal that is causing the
problem. In this case, contact "Repairs" on
the last page of this manual (in Japanese
only).
Removing and inserting docomo nano
UIM card may solve the problem.
Mobile network not available
●
P.33,
→
Install docomo nano UIM card correctly
(P.32), then move to a location where radio
signal reaches.
Normal calls are restricted by access
●
control.
Appears when normal voice call service is
hard to receive because communication
lines are busy.
Emergency calls are restricted by access
●
control.
Appears when emergency voice call service
is hard to receive because communication
lines are busy.
Appendix/Index
202