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Troubleshooting
279
The display is not clear
• In direct sunlight, you may not see the display clearly.
Moving to a place with different lighting should solve
this problem.
White lines appear on the display
• This may happen if you turn on the phone after a long
period of disuse, or after removing the battery without
turning off the phone. This is not related to the
phone’s life or performance. The display should
correct itself shortly.
“Locked” displays
• The automatic locking feature has been enabled. You
must press the
Unlock
soft key and enter the lock
code before you can use the phone. To disable this
feature, go to
Tools
→
Settings
→
Security
→
Phone and
SIM
and set
Autolock period
to
None
.
“PIN code” appears
• You are using your phone for the first time. You must
enter the Personal Identification Number (PIN)
supplied with the SIM card.
• The PIN check feature has been enabled. Each time
the phone is switched on, the PIN has to be entered.
To disable this feature, go to
Tools
→
Settings
→
Security
→
Phone and SIM
and set
PIN code request
to
Off
.
“PUK code” appears
• The PIN code was entered incorrectly three times in
succession and the phone is now blocked. Enter the
PUK supplied by your service provider.
Summary of Contents for SGH D720
Page 1: ...Samsung Smartphone SGH D720 ...
Page 298: ...Care and maintenance 298 ...