Zte S550 User Manual page 31

ZTE S550 User Manual
Problem Possible causes
• Poor signal.
You cannot answer • You have activated the Call Barring feature.
incoming calls.
You cannot make • You have activated the Call Barring feature.
outgoing calls.
• You have activated the Fixed Dial Number feature.
PIN code is • You have entered an incorrect PIN code three
blocked. consecutive times.
Unable to enter • The phone book's memory is already full.
information into the
phone book.
Confidential and Proprietary Information of ZTE CORPORATION 27
Possible solution
Move to an open space, or if you are
inside a building, move closer to a
window.
Go to Settings > Call > Call
Barring, and then select Cancel all
call barring.
Go to Settings > Call > Call
Barring, and then select Cancel all
call barring.
Go to Settings > Security > Fixed
Dial Numbers and select OFF to
turn this feature off.
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.
Delete unnecessary data from the
contacts (Directory).