The address book is outdated. On the iPhone, while most of my contacts reside in the Contacts app, I rarely go in there. Instead, I connect with people on Facebook, via SnapChat, WhatsApp and more.

I am wondering how people manage their address books. It's been a huge pain for me for years. I've hit on this: I sync email and calendars to my personal and work Gmail accounts, via Exchange on the ...

Chances are, the smartphone in your hand isn't your first. And chances are, it's carrying contacts from three, five, even 10 years ago that you've been faithfully migrating from phone to phone. My ...