User's Manual

User's manual
45
Six. Common problems and solut
ions
Before and after-sales service contact, follow these simpl
e checks, you might be able to avoid unnecessary maint
enance time and cost of waste.
Frequently
Asked Que
stions
Causes and solutions
Cannot boot
 n check whether to hold the power butto
n for at least one second;
 Check the battery connection is bad, ple
ase remove and then reinstall and retry t
he boot;
 Check the battery power is exhausted, pl
ease charge ；
Unable to c
onnect to th
e network
 n signal weak, please move to the stron
g signal to retry;
 outside the network service provider's net
work to cover;
 SIM card is invalid, contact your network
provider;
Boot time, t
he display i
nformation
 check the SIM card (SIM card inserted),
whether SIM card is installed correctly (s
ee page P12)
 phone lock password, set the phone loc
k, phone password must be entered prior