Zte A110 User Manual page 59

I cannot charge the
phone
I cannot connect to other
Bluetooth devices
My data usage is
excessive
ERROR MESSAGES
Message
No SIM Card
Confirm the charger is properly inserted.
Remove the battery, clean the contacts and check it is inserted
correctly. The battery may be worn out.
You can charge your handset from any standard USB port.
Try another lead if you have access to one.
Turn Bluetooth on. Set visibility to Show. Make sure the
pass-code is correct. Possible compatibility issues. Not all
functionality is supported between different Bluetooth devices
and standards.
Check Settings > Data usage to determine which apps are
consuming your data. Google+ can use large amounts of backup
data. Review under Google+ > Options > Settings
Solution
Check a valid SIM card is inserted.
See the Getting Started section
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