50
Symptom
What you should check
The phone turns on,
but operation is not
possible.
• Is the PIN code input screen displayed?
Input the PIN code.
I cannot release the
screen lock.
• Is the password input screen displayed?
Enter the password to release the screen
lock.
Nothing happens
when I press a
button.
• Is IS12T in sleep mode?
Press
C
/
A
to cancel sleep mode.
IS12T operation is
slow/application
operation is
unstable/some
applications do not
start up.
• Operation becomes unstable when
remaining IS12T memory capacity runs low.
If the low memory message appears, delete
applications you do not need in order to free
up memory space.
The phone will not
recognize the au IC
card.
• Was the au IC card facing correctly when
you inserted it?
The clock reading is
not correct.
• The clock reading sometimes becomes
incorrect if you leave IS12T on for a long
time.
After making sure that "date+time" of "Set
automatically" is turned on, turn IS12T off
and on in a location where signal reception
is good.
I cannot place calls.
• Is the au IC card installed in IS12T
correctly?
• Are you entering the number with its area
code?
• Is IS12T in airplane mode?
The ringtone does
not sound.
• Is the ringer volume set to "0"?
• Is forward all selected as the call forwarding
service?
Symptom
What you should check
Phone stops
suddenly during
video shooting/
I cannot activate the
camera
• When IS12T becomes high temperature
state, activating the camera fails and
start screen appears. Camera function
is controlled to be disabled when IS12T
is in high temperature state. Avoid high
temperature place, wait for a while until
IS12T temperature becomes low, and then
perform operation.
I cannot use the
phone. (Out of
service area does
not disappear from
the display even
though I move to a
different location,
cannot make or
receive calls even
though signal
conditions are not
bad.)
• Turn IS12T off and then back on again or
remove and reload the au IC card.
• Depending on signal properties, placing or
receiving calls may not be available even
though signals are strong and five antenna
marks are shown (
). Change to another
location and try again.
• In crowded places, heavy telephone/
mail traffic can make it difficult to get a
connection or use mail. In such locations,
the message "Please wait for a while" will
be displayed and you will get a busy signal.
Change to another location or wait for a
while and then tray again.
The display is dark.
• Check the backlight "brightness" setting.
During a call, the
other person's voice
is hard to hear or too
loud.
• Did you change the call volume?
The still pictures and
movies I shoot with
the camera are out
of focus.
• Is the camera lens clouded or dirty?
Cannot connect to a
Bluetooth
®
device/
cannot find it with
device search
• Check if the setting of Bluetooth
®
device
you are trying to connect to be discoverable.
If you are going to re-register an already-
registered Bluetooth
®
device, cancel the
pair settings for both IS12T and the
Bluetooth
®
device and then register the
device.
IS12T̲BasicManual̲.indb 50
IS12T̲BasicManual̲.indb 50
2011/09/02 18:48:19
2011/09/02 18:48:19
