Learn about the Union Bank of India balance check number and other methods like SMS, missed calls, and WhatsApp to check your account balance easily. Union Bank of India Balance Enquiry Number : Here are the methods to check Union Bank SMS, ATM, mobile, UPI and internet banking balance . Know about Union Bank of India balance check by Union Bank balance enquiry number , SMS, passbook, ATM, netbanking, mobile banking, missed call and more. Learn how to check your Union Bank account balance using various methods, such as missed call, SMS, customer care, passbook, USSD, mobile banking, online portal and WhatsApp. Find the toll-free numbers, SMS codes, missed call number and other details for balance enquiry.