This Mean your phone is NCK locked. So you need a Network unlock code so that you can use this for any network.
here is the process to get the unlock code
Go to below link
Unlock Your Cellphone Use Any Network in The World
Select As
Brand Name:-
Model No or Name:-
Country from The Phone Purchased:-
Network on which The Phone Is Locked:-
IMEI No:-
E-Mail ID
Place a Request for unlock code. this will delivered to your mail id with least possible time (Depends on the network)
You need to follow the below steps to use the unlock code
1) Insert a non compatible SIM card to your locked Cell Phone,
2) Phone will prompt for Unlock Code (NCK Code),
3) Enter the Unlock Code you received.
Phone will be unlocked for any network
