12) Appendix
Carry out the following simple examination before you contact after-sales service, perhaps it can
help you avoid the redundant maintenance time and expense.
Common problems and solutions
Common problems The causes and solutions
Unable to boot
Check whether the battery power is exhausted, please charge the
battery.
Check whether the battery is bad contact. Please remove it first
and reinstall, then retry boot.
SIM card error
1. SIM card metal surface have dirt, use clean cloth to brush the
SIM card metal contact point. 2. Reinstall the SIM card.；. SIM
card is damaged, please replace SIM card.
Poor signal
Check on the signal strength indicator of the screen, 5 bars
indicate a strong signal. Less than 2 bars indicate a weak signal
Unable to dial out
1. You may set to hide your phone number, but your network
operator does not provide the service.
2. Surrounding environment may have a strong interference
signal
3. You may activate call barring function.
4. You may activate the line2, but your network operator does not
provide the service.
Unable to charge
1. Battery may have over-discharge, it need to connect the
charger after a period of time to charge
2. Battery performance have been worse
Unable to connect the
network
1. The signal is weak, or around the radio interference.
2. SIM card is invalid, please contact with your network operator.
Unable to enter to
