Now you can make calls without entering your pin number every time.
Just sms WCC CREATE <12/14-digit pin> to 111 (toll free) to register your number to a particular pin number. Once done, you can make calls without the pin by dialling 50318 < ISD code > <destination number >
For eg, 50318-001-12345678.
This facility is available with only 1 pin at a time. If you send an SMS with a second pin, it will automatically overwrite the first one without carrying your balance forward.