How to know SBI bankaccount balance details by using single message with mobile?

step1:First register ............type REG<space>account number and send this message to 9223488888
 step2:after registration ...type BAL and send to 922376666 :)
before this you must register phone number on your account
other features are 
to know last 5 transactions type MSTMT and sent to 9223866666
to block card type BLOCK(last 4 numbers) send to  567676