M Phone User Manual | English
23 |
P a g e
No ringtone for incoming call
Possible causes of trouble
Troubleshooting
The alerting signal of incoming call is
set in mute mode.
Please reset alerting signal of incoming call in ringtone
The volume of ringtone is set too low. Please increase volume.
Call forwarding is set.
Please cancel Call divert
Battery can’t be charged
Possible causes of trouble
Troubleshooting
The battery is exhausted and
placed for too long.
Please charge battery in time after mobile phone
signalizes insufficient power.
Battery is in bad contact with
mobile phone.
Please make sure battery is correctly placed.
Charger is in bad contact with
mobile phone.
Please link well charger and port of mobile phone, now
the screen displays charging indicator
Battery or charger is damaged.
Please contact maintenance station designated by the
company
The surrounding temperature is too
low or too high.
Please charge mobile phone under normal
temperature.
No network displayed
Possible causes of trouble
Troubleshooting
SIM card is wrongly placed.
Please place SIM card correctly according to its
installation method on the instruction book.
There are impurities between SIM card
and contacts of mobile phone.
Please keep clean between SIM card and the contacts
of mobile phone.
SIM card is ineffective.
Please check if SIM card is expired.
Network environment is in weak
field
strength area.
Please move to the place with good signal strength of
network for using mobile phone.
Memory card can’t be found in mobile phone
Possible causes of trouble
Troubleshooting
Memory card is wrongly inserted.
Please use memory card correctly according to its
inserting method on instruction book.
Memory card is damaged.
Please change memory card.
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