134
Appendix/Index
Trouble
Check and remedy
The operation time
provided by the
battery is short
• Is the terminal left out of service area for a
long time? Out of service area, a lot of power is
consumed to search available radio waves.
• The operation time provided by the internal
battery varies by the operating environment and
battery deterioration.
• The internal battery is a consumable part. The
usage duration of the battery per 1 charge
decreases gradually each time the battery is
recharged. When the operation time is too short
even the terminal is fully charged, contact the
phone number given in "Repairs" on the last page
(In Japanese only) or DOCOMO-specified repair
office.
• Are multiple apps activated? Exit from all apps. →
• When not using Wi-Fi or Bluetooth function, turn
the setting OFF. → P.99, P.124
No operation is
performed even
when tapping the
touch screen
• Is the screen locked? Unlock the screen with
[Power/screen lock key]/
[Home key]. →
The touch screen
reacts slowly when
a screen is tapped
• It may occur when large amount of data is saved
in the terminal or transferring large-size data
between the terminal and microSD card.
• Do you attach a protection sheet on the terminal?
The operations may be impeded by the protection
sheet.
The docomo nano
UIM card is not
recognized
• Is the docomo nano UIM card installed with a
The clock is not on
time
• When the terminal is turned ON for a long time,
the clock may go wrong.
Make sure that "Automatic date and time" is set
and turn on the terminal at places where signal is
strong. → P.120
Trouble
Check and remedy
Terminal operation
is unstable
• It may be caused by apps installed to the terminal
after purchase. If problems improve when you
start in Safe mode (a function to activate the
terminal in a mode similar to default), problems
may be improved by uninstalling the app.
- To start Safe mode
Press [Power/Screen lock key] for 2 seconds
or more when power is OFF, and after docomo
logo disappears, continue to press volume
DOWN key.
* When Safe mode starts, "Safe mode" appears
on the lower left corner of the screen.
* To terminate Safe mode, open notification
panel and tap "Safe mode turned on" →
"RESTART NOW".
- For using Safe mode, back-up necessary data
beforehand.
- Note that apps or widgets may be removed.
- Safe Mode is not normal activation. Usually exit
Safe Mode and then use the terminal.
Terminal reacts
slowly/Behaviors
become unstable/
Some programs
cannot activate
• Confirm the internal memory usage of the terminal
and obtain memory by ending some activated
programs. → P.108
Data is not
displayed properly/
Cannot operate
the touch screen
properly
• Turn off and on the power. If it does not solve the
problem, trying "Factory data reset" (P.120) may
improve the symptoms. Note that the operation
erases all data saved on the terminal. Make sure
to back up necessary data beforehand.
App does not work
properly (cannot
activate, errors
occur frequently,
etc.)
• Are there any apps being disabled? Enable the
disabled apps and try again. → P.109