Registration(SBI): REG Account number to +919223488888
De-Registration: DREG Account number to +919223488888
Balance Inquiry:
Call or SMS as BAL on +919223766666
Mini Statement: Call or SMS as MSTMT on +919223866666
ATM Card Blocking:
BLOCK XXXX to 567676 (XXXX is last 4 digit of ATM Card No)
SBI Loan Features:
SMS as HOME or CAR to +919223588888 or 567676
A word of caution is that at times you may dial miss call no for account balance, you may get a recorded voice that this no does not exist. Probably it is due to higher pressure on that number and you can try again after some time.