User's Manual

38
Appendix1: Carry on the following simple examination before you contact with after-sales service,
perhaps can help you avoid the redundant maintenance time and expense to waste.
Common problems and solutions
Common problems The causes and solutions
Unable to boot
1、 Check whether the battery power is exhausted, please
charge the battery.
2、 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.