Sony Xperia A4 Instruction Manual page 201

15.5
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Cannot call (Even when moving,
not disappear, or although radio waves
are enough, making/receiving calls is
unavailable.)
Turn the power OFF and ON, or remove
and attach docomo nano UIM card.
P.32, P.39
Due to the nature of radio waves, making/
receiving calls may be unavailable even
when "not out of service area" or "
appears on the display for the radio wave
condition". Move to the other place and
call again.
Check if you set call rejection.
Due to the crossing of radio waves, at the
crowded public places, calls/mails are
crossed and the connection status may
not be good. Move to other place or call
again at other time.
An application activates when dialing
If you dial to a phone number subject to
(Mobile select),
モバイルセレクト
(Mobile select) application
セレクト
activates. Follow the onscreen
instructions.
does
Display
The display is dim.
P.87, P.88
Sound
During a voice call, the distant party's
voice is hard to listen to or too loud.
モバイル
Check if Sleep is set in short time period.
P.157
Check if the brightness of screen is
changed.
P.157
When "Adaptive brightness" is ON, screen
brightness is changed according to the
ambient brightness.
Check if Low battery mode in Power
management is ON.
Check if you cover the Proximity sensor
with a sticker etc.
P.30
When the temperature of the terminal
becomes high while using, the display
may become darker. It is not abnormal.
Check if the listening volume is changed.
P.84
Set the equalizer to adjust sound quality
during a call.
P.88
Enable Speaker voice enhancement, Slow
talk to make the caller's voice clear to
understand.
P.88
P.157
P.160
Appendix/Index
199

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