How to transfer balance from one mobile to another

Tata docomo -

Type>>

BT<space> MobileNumber<space> amount  and send it to >> 54321

Vodafone-

Send:
TRAN (amount u want to transfer)
(phone number of your friend)
to
144(tol free)

or

Dial>>

*131*20*<phone number>#

& press call button

Bsnl-

just send sms as

GIFT<space>mobile number<space>and send it to>> 53733

Airtel-

dial>>

*143*<phone number>#

& press call button u can transfer Rs.50

Idea-

Dial>>

*567*<phone number>*Rs#