Hmmm see the phone number is required so that need to match with bank record and hdfc here app would detect you’re using android phone. So better to keep iPhone pair it and sim can be in android.I have an old iPhone which I was about to sell in few months. My primary phone is Android. So the HDFC Ergo app will be in my Android phone.
Hence I was confused if it requires active pairing with an iPhone or not.