You love using Wi-Fi at home. You have your laptop, your smartphone and your tablet hooked up to it so you can surf the web from anywhere in the house. Well, almost anywhere. The Wi-Fi box (the router ...

So, you're happily streaming a TV show on your phone, but when you move to a different room, your Wi-Fi suddenly cuts out. This has been an age-old problem, especially in homes with a single router.