David has loved the iPhone since covering the original 2007 launch; later his obsession expanded to include iPad and Apple Watch. He offers advice to owners (and prospective owners) of these devices.
Feeling paranoid or ignored? Maybe they've blocked your number, using a handy iPhone feature in iOS 7 and iOS 8. Here's how to find out if you've been blocked
Get fit and stay healthy with the Apple Watch's Activity app, which tracks your daily exercise and calorie-burn goals. Plus: How to change your weight or height