All Microsoft Apps for Web Browser, Emails, Document Scanning, Notes taking and Office, since I started from Windows Phone as my smartphone, all my default mental preferences have been set there. Moreover, Microsoft accounts syncs all data to my other phone, tab and laptop.
Here Maps and Google Maps instead of Apple Maps.
Paytm/PhonePe/Google Pay instead of Apple Pay as Apple Pay isn't available in India.
WhatsApp, as again iMessage and FaceTime isn't used by people who even own an iPhone in India. Most people haven't even turned it on on their phones here.
The volume control, notification categories like Android and it's high time now, the phone keypad should be T9! Auto search in the keypad as soon as you start typing numbers, matching both numbers and T9 names.