25
Echo or noise
1.
The
network
operator's poor trunks
caused
Hang up and dial
again, trunks' choice
may exchange for good
lines.
2. call line of some
places is in bad
can'tbe turned
on
The
battery
is
exhausted
To
recharge
the
battery
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
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