Fixed Dialling Service.
Dont want any mobile number to be called from your mobile , bar outgoing calls by activating fixed dial service. Go to settings > cost setting (in some handsets - security setting)>fixed dialling & activate fixed dialling.
Airtel default pin 2 code - 4321
Aircel default pin 2 code - 0000
Reliance default pin 2 code - 0000
If your pin 2 code is blocked & your handset wants PUK 2 code , simply get PUK code from your operator & feed in , that also works.
If you want special numbers only to be called from your mobile , go to fixed dialling > numbers & add the desired numbers to the list.
When fixed dialling is active , you can also hide your contact list & will be also unable to delete call log & also cannot save any contact in your sim memory.
Fixed dialling works perfectly with aircel & reliance but not with airtel.