73
Signal is too weak or
there is no signal
Network coverage is inadequate or network fails.
Move to a wide area and retry.
The setting function is
not supported by the
Network.
Contact your network operator to make sure
whether this function is supported.
Cannot change
the function
settings.
SIM PIN2 code is wrong.
Enter the correct SIM PIN2 code. If you don’t
know SIM PIN2 code, you can contact your
network operator.
Temperature is too high
or too low.
Use the mobile phone with the ambient
temperature between 5
0
C and 40
0
C.
The screen
cannot be
lightened.
The mobile phone is
power off.
Power on the mobile phone.
The phone is
power off
suddenly.
The battery looses.
Reinstall the battery.
The power of the battery
is not enough.
Recharge the battery for 12 hours, ignoring the
fully charged signal.
The mobile phone is
used too frequent.
Use it as needed.
Press the button
unconsciously.
Keep your mobile phone carefully and avoid
pressing the button.
The battery is aging.
Replace a new one.
The standby time
is too short
Temperature is too high
or too low.
Please use it with the ambient temperature
between 5
0
C and 40
0
C.
PIN cord errors
PIN code is entered
incorrectly for three
times.
Take the SIM card to the network operator to
unlock it.
SMS is set incorrectly.
Contact your network operator and get the
correct settings.
Cannot send or
receive SMS.
SMS overflows
Delete some short messages.
Summary of Contents for R2811
Page 1: ... 1 R2811 USER MANUAL ...
