ZTE A462 / Telstra Smart Plus - Manual (Page 55)

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Symptom Solution
I cannot connect to
other Bluetooth devices
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.
My data usage is
excessive
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
ERROR MESSAGES
Message Solution
No SIM Card
Check a valid SIM card is inserted.
See the Getting Started section
Enter PIN code You have set a SIM PIN. Please enter your SIM PIN code.
Enter PUK code Contact your Service Provider to get the PUK code
Enter Unlock Code
Contact your Service Provider to obtain the network
unlocking code.