Mio S20 User Manual page 23

Battery don't charge
the data can't be
input in the phone
book
Unable to set some
function
（Note: if someting abnormal happened with the phone, please refer to the table above for solutions.
if problems still exist, please contact with network operator or the machine manufacturer .Text
and images in the instructions leaflet is only for reference,please in kind prevail）About the
statement conforming to《the pollution's control measures of electronic products》
1. The battery
charger is damaged
2. The cell phone is 5 degrees
Celsius temperature below
or above
centigrade.
3. Contact undesirable
the phone book is full
Network operators do not provide
this function
21
or battery
1. Replace new battery or charger
2. Adjust charging environment
3. Check if the joint connectiont
is good,
40 degrees
Keep
minutes
Delete parts of this phone book
Contact with network operators
charging more than 20