​​HDFC Bank Mobile App: You will lose access unless your phone is updated and complaint for new verification process
HDFC Bank mobile app: HDFC Bank has updated their security protocols in their mobile banking app. These security protocols will protect customers of the bank against any impending cyber attacks. However for implementing these security features customers of the bank would need to have their bank registered number inside the phone among other things.
Sameer Ratolikar Hdfc Bank Mobile Number Verification Mobile Banking Mobile Banking App Senior Executive Vice President
Source: indiatimes.com