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entering PIN for each start of the mobile
phone, and so you must enter the PIN code
(When the mobile phone is first used, the
PIN code on the SIM card must be entered).
Enter the PUK code. Wrong inputting of the
PIN code will lock up your mobile phone, and
you should use the PUK code provided by
the network operator to launch it again.
Poor calling
quality
Please check whether the volume has been
adjusted appropriately.
The mobile phone is used in the place with
poor signals, such as near a high-rise
building or in a basement, where radio
waves can not effectively reach.
The mobile phone is used in peak hours, for
example, the time to go to and leave work,
and line congestion makes it impossible to
call.
Short
standby
time
The standby time is related to the system
settings of the network, and the mobile
phone is possibly in an area with poor
signals. When it fails to receive signals, the
mobile phone will continuously transmit to
look for a base station, thereby consuming a
lot of battery power and leading to a shorter
standby time. Please move to a place with
strong signals or shut down the mobile
phone for a moment.
Replacing a new battery is needed.
SIM card
The metal surface of the SIM card is
Summary of Contents for DST450
Page 1: ...1 USER MANUAL ...
