Cellular connection works well for phone calls, email, Siri and messages. Music now syncs more easily. Improvements in fitness tracking and added watch faces.

Smart lightbulbs, smart locks and small smart sensors for your doors and windows frequently don't talk directly to your router, as signaling with Wi-Fi takes a lot of battery.

The iPhone 8 offers wireless charging, lightning-fast performance and small but solid upgrades to its camera, screen and speakers. Its starting storage size is a roomy 64GB, double that of the iPhone 7.