User's Guide

26
avoid interfering with blasting operations.
System update
System supports firmware upgrade only from official website or server. If
user uses 3rd party ROM image and/or any other root method to upgrade
firmware,it will cause phone unstable and raise further security risk and
pitfalls. Please be noted user should take all responsibility for all these
behaviors.
Common fault diagnosis
The faults
possible reasons
Can’t turn on
1 、 Whether there is electricity in the
battery；
2、Battery is correct.
SIM is wrong
1、SIM is dirty and clean it；
2、install the SIM again；
3、SIM is wrong，replace it.
Bad signal
Check the signal display in the stutas bar.
The phone
can't call
May have a strong jamming signal around the
environment.
Can’t charge
May be the battery discharge. Need to wait
for a few minutes.
Taking pictures
is not clear
Please make sure that both sides of the
camera lens cleaning.