Verykool i129 - Manual (Page 12)

6. Common fault diagnosis
Fault phenomenon possible reasons
Cannot turn on The battery is discharged. Charge it with electricity.
Wrong SIM Card
SIM card smudgy, clean the SIM card. Reinstall the SIM
card. SIM card has been damaged, replace the SIM card。
Reception bad
Check on the screen of the signal strength indicator, and
this is the number of symbols in this for 5 case said the
strong signal, 2 case said the weak signal
Phone can't dial
you may set the hide the machine number, but your
network operator does not provide this service;
may have a strong interference environment around
signal;
may you activate the call barring function;
may you activate the line 2, but your network operator
does not provide this service；
Battery can’t charge
may have excessive discharge battery, charger needed to
connect after a period of time to charge;
battery performance have been worse;
Unable to connect to the
network
signal is too weak, or around the radio interference
SIM card is installed correctly, whether contact
undesirable or SIM card has been damaged? Such as the
SIM card is damaged, please you consultation network
service operators
Photographs too dark
brightness set low;
environment light around a dark;
Photographs too vague
Shooting in a state of motion object；
Press the shutter moment cell phone has a slight shaking；
Dark
Photographs have
distortion
May be the foreground subject distance lens too close