Sony Xperia A4 Instruction Manual page 199

15.5
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The notification LED blinks in red and the
terminal cannot be operated.
When the battery level is low, charge the
battery.
P.33
Terminal operation
Become hot while operating/charging.
While calling, depending on the radio
wave condition or call duration time, the
terminal may become hot around the
earpiece/speaker. This condition is not
abnormal.
While operating or charging, or if you
watch 1Seg, record video, etc. for a long
time while charging the battery, the
terminal, internal battery or adapter may
become hot. There is no problem about
operation and continue to use it.
The operation time provided by the
battery is short.
Is the terminal left for a long time under
the state of out of service area?
Out of service area, a lot of power is
consumed to search available radio
waves.
The operating time of the battery varies
depending on the operating
environment and the degradation level of
the internal battery.
The internal battery is a consumable part.
Each time it is charged, time available with
each charging reduces.
P.34
If the operation time becomes too short
with fully charged state, contact "Repairs"
on the last page (in Japanese only) or a
DOCOMO-specified repair office.
Operations are not possible when tapping
or pressing keys.
Check if the power is turned off.
Check if you activate the screen lock.
P.167
When you touch the screen at a right
angle by gloved finger with "Glove mode"
ON, operation may not be performed
well. Use a ball of finger to touch the
screen for operation.
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 nano UIM card is not
recognized.
Check if the docomo nano UIM card is
attached in the right direction.
P.39
P.157
P.32
Appendix/Index
197

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