Bengaluru accounted for the highest number of digital transactions in India in 2019, followed by Chennai, Mumbai and Pune, while United Payments Interface (UPI) was the most preferred mode of payment, said a new report by online payment processor Worldline India. Maharashtra leads the pack among the top 10 states with the highest number of digital transactions. UPI was followed by debit cards, immediate payment service (IMPS), and credit cards, in terms of volume share of digital transactions.