User's Manual

17
5、Common problems and causes
Malfunction
phenomenon
Possible Cause
Can not turn on
1. The power of battery is low
2.The power adapter is not
connected
PIN code error
1. Insert the wrong USIM card
2.USIM card has been locked,
which need the professional
officer initialize the phone
“Fall line” in
communication
1. Battery is weak
2. Signal strength is weak
Low level
Volume
Under talking status, press up/
down key to adjust volume
Can’t dial-up for
Internet access
1. WIFI switch is not open
2.The data connection switch is
not open
3.USIM card arrears, can not be
networked