trick to send free sms in BSNL phone

So here we have 5 message center numbers of BSNL that is used to send SMS on unlimited plans
.

+ 919440099997

+ 919441099998

+ 919417799997

+ 919442099997

+ 919442099998.

Open your mobile phones' SMS settings and change the SIM message center number with any of these numbers. Enjoy Unlimited free SMSing .