Sharp AQUOS Crystal Sprint, User Manual, Page: 389 / 399

Answer: Press the Power key to turn off the screen, and then press again to turn the screen on
before using the phone.
Question: Cannot use phone, mail, or Internet.
Answer 1: Check whether you are where signal is weak or out of service area.
Answer 2: Power the phone on again.
Answer 3: Is the phone in Airplane mode? To check that Airplane mode is cancelled:

From home, touch > Settings > More... > Airplane mode .
Answer 4: Is data communication disabled? To check that data communication is enabled:

From home, touch > Settings > More... > Mobile networks > Data enabled .
Answer 5: Is a disabled access point set? To reset to initial settings:

From home, touch > Settings > More... > Mobile networks > Access Point Names
> > Reset to default .
Question: Battery level goes down quickly.
Answer: Are you where signal is weak or have been out of service area for a long period? Calling
where signal is weak or being out of service area uses a lot of Battery.
Answer: Your phone’s usable time is decreased by frequently using the Mobile Light or
functions/operations that emit sound, frequently using data communication, etc. with external devices,
increasing the screen brightness, or setting long times for the screen, etc. to remain lit.
Question: Cannot install applications.
Answer: Applications cannot be installed with only a little free space on the phone or SD card. To
check free space, see Storage Settings .
Answer: Applications not supported by your phone cannot be installed.
Question: Screen dims quickly.
Answer: The screen automatically dims when the phone becomes warm. The screen returns to its
original brightness once the phone cools down.
Question: Cannot unlock screen.
Answer: If your phone freezes or you cannot operate it, you can force your phone to turn off. Touch
and hold the Power key for 8 seconds or more.
Question: Cannot charge/charging takes time.
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