Standby time becomes
short
1. Standby time have something to
do with network operators' system
setting. The same cell phone is
used in different networks,standby
time may not the same.
In the signal receiving bad areas,
please temporarily shut down
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