If you thought web page ads and e-mail spam were the most annoying things in the world, then you probably have been on the receiving end of spam calls. This day and age, it is still common to receive such unwanted attempts on our smartphones. Luckily, technology has made identifying and blocking those numbers a lot easier. Google has finally made use of that technology for its Android phone app, giving users much needed peace of mind. The catch? It's only available for Google's own smartphones.