5
Note
：
When it is in charge, place the phone on condition of good ventilation and
temperature between 0
℃～＋
45
℃
. Ensure to use the charger offered by the
manufacturer. Using unauthorized charger may cause danger and violate the
authorization of the phone and the guarantee article.
When the phone is automatically switched off or indicates the alarm information of
power shortage, charge the battery in time.
The duration time of the standby status or conversation of the phone is based on
ideal working environment. In practice, the working time of battery varies with
network condition, working environment and application methods.
Please install the battery firstly before charge or use it.
2.
(U)SIM Card
Power off the phone and remove other external power.
Press and push the back-cover of the phone down to release and remove it.
Insert (U)SIM card into (U)SIM card slot in the phone or pull out (U)SIM
