Zte Blade A510 User Manual page 127

Problem Possible causes
The signal is poor.
Cannot answer You have activated the Call
incoming calls barring feature.
You have activated the Call
barring feature.
Cannot make
outgoing calls
You have activated the Fixed
dialling numbers feature.
You have entered an incorrect
PIN Code
PIN code three consecutive
blocked
times.
Phone crashes,
reboots, freeze, Some third-party software is not
or cannot be compatible with your phone.
powered on
127
Possible solution
Move to an open space, or if
you are inside a building, move
closer to a window.
Disable this feature. See Bar
Certain Calls.
Disable this feature. See Bar
Certain Calls.
Disable this feature. See Use
Fixed Dialling Numbers.
Contact your service provider. If
the service provider provides
the micro-SIM card's PUK code,
use the PUK code to unlock the
micro-SIM card.
Uninstall the software that may
cause the problem.
Upgrade the phone software.
Reset the phone to factory
status.