Zte D300 User Manual page 41

D300 User Manual
Problem
• UIM card inserted improperly.
• Debris on the UIM card contacts.
• UIM card invalid.
• You are not within the network's service
Unable to
connect to the area.
network.
• Poor signal.
You cannot You have activated the Call Firewall
answer incoming feature.
calls.
You cannot make You have activated the Call Firewall
outgoing calls. feature.
You have entered an incorrect PIN code
PIN Code is
three consecutive times.
blocked.
Unable to enter The phone book's memory is already full.
information into
the phone book.
Possible causes
Confidential and Proprietary Information of ZTE CORPORATION 35
Possible solution
Insert the UIM card properly.
Use a soft, dry cloth to clean the UIM 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.
Go to Settings > Call > Call Firewall > Current
Setting, and then select Firewall off.
Go to Settings > Call > Call Firewall > Current
Setting, and then select Firewall off.
Contact your service provider. If the service
provider provides the UIM card's PUK code, use
the PUK code to unlock the UIM card.
Delete unnecessary data from the Contacts.