User's Manual

50
switch on charge.
SIM card
problem
SIM card damaged. Contact the network
service provider.
SIM card unfixed. Make sure SIM card has
been inserted and fixed
properly.
Stain on SIM card surface. Wipe the metal contact of
SIM card with clean
cloth.
Unable to
connect to
network
SIM card invalid. Contact the network
provider.
Out of GSM service range. Contact the network
provider to check service
range.
Weak signal. Move to areas with strong
signal.
Unable to call
Call restriction function is on. Cancel call restriction
function.
Fixed dial is on. Cancel Fixed dial.
PIN error Wrongly input PIN code for three times. Contact the network
provider.
Unable to
charge
Battery or charger broken. Change battery or
charger.
Charge in environment with temperature
lower than -10 or higher than 45 .℃℃ Change environment.
Bad contact. Check if connected
properly.