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Power discontinuity/rebooting occurs.
If terminals of battery pack is soiled,
connection gets worse and it may cause
power to be turned off. When it is soiled,
clean the terminals of the battery pack
with a dry cotton swab etc.
Operations are not possible when tapping
or pressing keys.
Check if the power is turned off. P.38
Check if you activate the screen lock.
P.227
When you cannot cancel the screen lock
by flicking up or down (swipe) on the
unlock screen, Explore by touch of
TalkBack may be set to On. If Explore by
touch of TalkBack is enabled, flick (swipe)
the screen up or down with 2 fingers.
P.237
The screen reacts slowly when you tap or
press keys.
When large amount of data is saved in the
terminal or transferring large-size data
between the terminal and microSD card,
the reactions on the screen may be
delayed.
The docomo mini UIM card is not
recognized.
Check if the docomo mini UIM card is
attached in the right direction. P.32
The clock is not on time.
The clock time may become wrong while
turning on the power for a long time.
Check if "Automatic date & time" and
"Automatic time zone" are set to on and
turn the power off and on in a place with
strong radio wave conditions. P.235
The terminal operation is unstable.
Instability may be caused by applications
that you installed after purchasing the
terminal. If the symptom is improved
when you boot the terminal in safe mode
(near default state), uninstalling the
installed application may improve the
symptom.
To boot the terminal in safe mode, press
and hold
P
for over a second with the
terminal OFF until XPERIA logo appears,
and then touch and hold
bottom. When safe mode is booted, "Safe
mode" is displayed at the lower left of the
screen.
To exit the safe mode, turn power OFF
and then ON.
With the power on, press
second, then touch and hold [Power off]
and tap [OK] to restart the terminal in Safe
mode.
* Back up the necessary data before using
safe mode.
m
at the
P
for over a
Appendix/Index
269
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