57
3. The battery is installed incorrectly.
Check if the battery is seated correctly on the
device.
4. Abnormally using leads phone not to power
on.
Please contact the local service centre.
2. Audio quality seems poor?
Possible Reasons for Malfunction
Solutions
1. The current signal strength is unstable.
You may be in the fast-moving state train or car,
etc.), according to the signal strength, select a
place with good signal to make a call to ensure
call quality.
2. You might be in an area where the signal
strength is low.
Please move to open areas.
3. My device would not make and/or receive calls?
Possible Reasons for Malfunction
Solutions
1. You might be in an area where the signal
strength is low.
Make sure you are in the area with good cell
signal. To ensure it, see the signal strength
indicator on the top right of your device screen
2. You might have set your Call Forwarding on
your phone.
According to your needs, please cancel call
forwarding.
3. Check if your device is set on Airplane mode.
Please Undo it
Summary of Contents for Fab! F51
Page 1: ...User s Manual...
Page 11: ...11 2 Insert the SIM cards 3 Insert the battery...
