Zte Z223 - Page 38

Z221 User Manual
34 Confidential and Proprietary Information of ZTE CORPORATION
Problem
Possible causes
Possible solution
provider for testing.
(U)SIM card inserted improperly.
Insert the (U)SIM card properly.
Debris on the (U)SIM card contacts.
Use a soft, dry cloth to clean the (U)SIM card
contacts.
Unable to connect
to the network.
(U)SIM card invalid.
Contact your service provider.
You are not within the network’s service area.
Check the service area with your service
provider.
Poor signal.
Move to an open space, or if you are inside a
building, move closer to a window.
PIN code is
blocked.
You have entered an incorrect PIN code three
consecutive times.
Contact your service provider. If the service
provider provides the (U)SIM card’s PUK
code, use the PUK code to unlock the (U)SIM
card.
Unable to enter
information into the
phone book.
The phone book’s memory is already full.
Delete unnecessary data from the Directory.