User manual

S400 39EN
Bad talking quality:
• Weak signal? See: Weak signal or no signal.
• Check if battery if battery is low. Charge the
battery or change the battery.
• • Usetheupvolumekeytoadjustthe
microphone volume during a call.
Can’t make a call:
• Check if you enter the correct number and press
green key.
• heck if you set call barring, if yes, please cancel it.
• Check if the SIM card is registered in the network.
• If your SIM card is a prepaid card, please make sure
there is enough money on the card.
Can’t receive calls:
• Is the SIM card registered in the network?
• Check if your phone is turned on.
• Check if screens shows no signal, if yes, see: Weak
signal or no signal.
• Check if you set call barring, if yes, please cancel
it.
Screen is dark:
• Check if battery if battery is low. Charge the
battery or change the battery.
• Adjust the wallpaper.
• Your phone may be affected with damp, keep it dry.
FAQ