User's Manual

2. The battery
wears,and the
performance will be
gradually reduced
after using a few years
Replace new battery
3. When couldn't get a
signal, phone will
continue to launch to
look for the base
station, which will
use a lot of battery,
and cause standby time
short.
Move to area of good
signals or shutdown
for the moment
No network
service
1. The SIM card is
invalid
Contact with network
operators
2. Not in a service
area
Check the network
operator's service
area
3. Weak signal
Move to the window or
choose another
service network
SIM card can't
use
1. SIM card is
damaged
Back to network
operators for
inspecting
2.SIM card is not
installed properly.
To properly installed
the SIM card
3. SIM card contacts
is not clean
wipe the contacts with
a clean cloth
Can't send SMS
Not open this service
or no input text
contact with network
operators, and set the