YONO App Download YONO SBI Mobile App SBI CardYou can write to the customer service department of SBI at the following address: Customer Service Department. State Bank of India. State Bank Bhavan, 16th floor. Madam Cama Road. Mumbai 400 021. Fax: 022 22742431. Tel: 022 22024456. You can also address a letter to the principal nodal officer: General Manager. Customer service. State Bank of India