F870E User Manual
42 Confidential and Proprietary Information of ZTE CORPORATION
Problem
Possible causes
Possible solution
USIM card error
• USIM card malfunction or damage.
Take the USIM card to your service provider for
testing.
• USIM card inserted improperly.
Insert the USIM card properly.
• Debris on the USIM card contacts.
Use a soft, dry cloth to clean the USIM card
contacts.
Unable to
connect to the
network.
• USIM 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.
You cannot
answer incoming
calls.
You have activated the
Call Barring
feature.
Go to
Settings > Call > Call barring
, and then
select
Cancel all call barring
.
You cannot make
outgoing calls.
• You have activated the
Call Barring
feature.
Go to
Settings > Call > Call barring
, and then
select
Cancel all call barring
.
• You have activated the
Fixed Dial
Number
feature.
Go to
Settings > Security > Fixed dial
numbers
and select
Status
to turn this feature
off.
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 Contacts.
Содержание F870E
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