Tethering lets you share the data connection from your iPhone or cellular iPad with your Mac, PC, Wi-Fi tablet, and other devices. There are three ways to tether to your iPhone or iPad and they are USB (via Lightning or Dock cable), Bluetooth, and Wi-Fi (personal hotspot). But which one gives you the fastest speed? Which one gives you the most reliable connection? Which one saves you the most battery life? Which is the best way to tether to your iPhone and iPad?