Code to trasfer balance in vodafone:

Dial *131*AMOUNT*MOBILE NO#. 
E.x:- *131*50*7702404546# 
To Transfer 50 Rupees Of Balance.

Here is the code to exchange BSNL operator balance to others or to your mobile.

Just Type the Sms as GIFT MOBILE NO AMOUNT and send it to 53733. 

Ex ;- Type GIFT 7702404546 55 and send it to 53733 . 

55 Rupees of Balance is Transferred.

 This trick  is useful to transfer/exchange balance between your friends.

For BSNL mobile Recharge 

Dial  *123*18 digit secret code # get instant recharge

To Transfer Balance In Uninor Just Dial *202*MobileNumber*Amount#.

E.g. *202*9876543210*30# To Transfer 30 Rupees.