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2. You are using your mobile phone
at a call-crammed time (e.g. rush
hour).
Avoid using your mobile
phone at such time.
3. You are too far from the base
station of your network service
provider.
You can ask your network
service provider for a
service range map.
Echo or
noise
1. Due to the quality of the network
trunk of your network service
provider.
2. Poor local telephone line quality.
Hang up the phone and
then dial again. You can be
switched to a better-quality
network trunk or line.
1. The standby time can depend on
the system settings of your
network service provider.
If you are in a location
where the signal is weak,
turn off your phone
temporarily.
2. The battery life is over. Use a new battery.
The
standby
time
becomes
short
3. If the phone can not get connected
to a network, it will continue
searching for the signal from the
base station, which consumes
battery capacity.
Change your location or
turn off your phone
temporarily.
Unable to
power on
The battery is used up. Check the battery capacity.
1. SIM card is out of order. Send it to your network
service provider to check.
2. SIM card is not installed properly. Install SIM card correctly.
SIM card
error
3. SIM card contact is contaminated. Clean the SIM card
contact.