As you have asked about the Mobile Banking Services (MBS) provided by State Bank of India (SBI), I am giving you information about it, check below for the details

Mobile Banking Service over Application/ Wireless Application Protocol (WAP)

The service is available on java enabled /Android mobile phones (with or without GPRS) /i-phones where the user is required to download the application on to the mobile handset.
The service can also be availed via WAP on all phones (java/non java) with GPRS connection.
The following functionalities are available:

Funds transfer (within and outside the bank)
Immediate Payment Services (IMPS): Click here for details.
Enquiry services (Balance enquiry/ Mini statement)
Cheque book request
Demat Enquiry Service
Bill Payment (Utility bills, credit cards, Insurance premium), Donations, Subscriptions
Mobile /DTH Top up
M Commerce (Merchant payments, SBI life insurance premium)

Business Rules

All Current/ Savings Bank Account holders in P segment and Current accountholders in SME segment are eligible.
Transaction limit per customer per day is Rs.50,000/- with a calendar month limit of Rs.2,50,000/-
All customers can avail the Service irrespective of their telecom service provider.
The Service is free of charge. SMS/GPRS cost will be borne by the customer.

Mobile Banking Service over SMS:

The service is available on all phones.
You can send keywords as SMS to 9223440000.
Ordinary SMS charges are applicable.

The following functionalities are available:

Enquiry Services (Balance Enquiry/Mini Statement)
Prepaid Mobile / MobiCash wallet Top up
DTH Recharge
IMPS Fund transfer – (Mobile number & MMID and Account Number & IFS Code)
Change MPIN
IMPS Merchant payments

Mobile Banking Service over USSD (Unstructured Supplementary Service Data)

The service is available on all phones except CDMA phones.
Downloading of application is not required.
Subscribers have to dial *595# to avail the service.
The following functionalities are available:

Enquiry Services (Balance Enquiry/Mini Statement)
Mobile Top up
Funds Transfer (within Bank)