One thing comparable had occurred in December last year when customer complained that they have been unable to pay their mortgage EMIs or settle credit card payments on time. RBI deputy governor M.K. Jain had mentioned in December that the regulator has taken into consideration the outage and has deployed a team of specialists to research into the matter. The RBI team will examine the explanations behind the outage and accordingly give instructions to HDFC Bank, Jain had mentioned. Clients took to Twitter on Saturday to complain the unavailability of the bank's internet banking, unified payments interface (UPI) and even debit and credit cards. "An unexpected outage at one of our data centers has impacted some of our services. We are working towards restoration of the services, which shouldn't take long. The inconvenience is sincerely regretted," stated a tweet by one of HDFC Bank's official accounts.