- e-ink - phone calls - SMS (I don't send them, but I need them for 2FA) - contact book synced with Google - calendar synced with Google - clock with alarms, timer and stopwatch - weather - music, it would be nice to use Spotify because I've invested a lot of time creating playlists but local files would do - bluetooth to send music to speakers - flashlight - sound recording (for calls recording and voice notes) - Whatsapp, it's my most used form of communication with family, friends and colleagues. But only text, no videos or images
Optional but nice: - tethering - QR codes store for things like tickets that I could send from another device
It would be enough for most of my day. I would have a second device for web browsing, maps and navigation, email, banking, QR reading, documents, gaming, etc., that I would only use when I really want to do those things.