Zte N880G Manual page 157

Problem
connect to
the network
Cannot
answer
incoming
calls
You cannot
make
outgoing
calls.
Unable to
enter
information
into the
phonebook
Possible causes
You are not within the
network's service area.
Poor signal.
You have activated the
Call barring feature.
You have activated the
Call barring feature.
You have activated the
Fixed dial numbers
feature.
The phonebook's
memory is already full.
Possible solution
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 Barring Settings,
and then select
Deactive All.
Go to Settings > Call >
Call Barring Settings,
and then select
Deactive All.
Go to Settings > Call >
Fixed Dialing Numbers
and disable it.
Delete unnecessary
data from the contacts.
157