Zte Z432 User Manual page 71

Problem
You cannot switch your
phone on.
SIM card error
Unable to connect to the
network.
PIN Code is blocked.
Unable to enter
information into the phone
book.
accessible, or temporarily turn off your phone.
Recharge the phone's battery.

Take the SIM card to your service provider for testing.

Insert the SIM card properly.

Use a soft, dry cloth to clean the SIM card contacts.

Contact your service provider.

Check the service area with your service provider.

Move to an open space, or if you are inside a building,

move closer to a window.
Contact your service provider. If the service provider

provides the SIM card's PUK code, use the PUK code
to unlock the SIM card.
Delete unnecessary data from the Contacts.

64
Solution