State Bank of India is the world’s top tier banks and one of the biggest banks in India as well. One of the main parts is that their service is integral to all their account holders. And if you have an SBI Mobile Number Update account with SBI then you might be lucky because they are well known for being great on their interest rates. State Bank of India is the world’s top tier banks and one of the biggest banks in India as well. One of the main parts is that their service is integral to all their account holders. And if you have an account with SBI then you might be lucky because they are well known for being great on their interest rates.