to set special fnf number dial *166*7*desired number#. to change special fnf dial *166*7*old number*new number#. to set fnf, type the number and send sms to 3300. in case of multiple numbers additions each number must be separated with a space.
example: type 0191xxxxxxx0191xxxxxxx0191xxxxxxx send sms to 3300. to know current fnfs type ff and send sms to 3300 to replace one fnf with another type cold numbernew number and send sms to 3300. to delete a fnf type remnumber and send sms to 3300. fnf will be set within 48 hours of sending request. .
