How To RETRIEVE And Get Your MTN TRANSFER PIN Back Easily When Forgotten

How to change it if mtn block your transfer pin or you have forgotten your pin...you can use this to get new pin,Simple type yes in sms and send it to 556, with for some minute youwill receive a message from MTN in this form,"welcome to share & sell, your default your new pin is 0000.MTN recommends you reset the pin,test to 556, eg.0000 2222 2222 and send it to 556,You will receive message that your pin has been reset