Sony CMD-J5 Operating Instructions Manual page 60

Problem
Phones loses
network
SIM error
SIM card not
registered
Not able to
receive calls
60
Possible Causes
Weak signal
Damaged SIM card
Network does not
recognize the SIM card
Call barring set
Divert set
Possible Remedies
Reconnection, or
connection to another
operator is automatic.
Switching phone off and
on may accelerate this.
Please contact your service
provider.
Please contact your service
provider.
Check incoming call
barring settings.
Check call divert settings.