I haven't set up a custom ringtone in years since I don't receive that many calls nowadays, but I having been setting up the "Hey!" notification sound from the Google Nexus phone on all my newer, non-Google phones that followed it.
Honestly, on an iPhone, I wish I could completely mute/disable the Phone app, so when it calls it doesn't overtake whatever you are doing, or just delete it.
davidhs|6 months ago