Verykool s4010 - Manual (Page 30)

30
equipment.
Areas with potentially explosive atmospheres include fuelling areas,
below decks on boats, fuel or chemical transfer or storage facilities, areas
where the air contains chemicals or particles, such as grain, dust, or metal
powders.
Blasting Caps and Areas
Power off your mobile phone or wireless device when in a blasting
area or in areas posted power off “two-way radios” or “electronic devices” to
avoid interfering with blasting operations.
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.