As actor Mark-Paul Gosselaar stands in front of a blue and orange animated screen, he reminisces about how, back in the day, phones were gigantic, hair had lots of gel in it and jeans were acid-washed. Since then, things have definitely changed. For instance, phones can now find love, check on the status of 4,000 friends and watch adorable kitten videos. Also, you can use your phone to watch movie trailers and buy tickets ahead of time on Fandango! Although Mark wouldn't be able to do these things with his old brick phone, he can at least use it for a good arm workout.