answer: #Person1# wants to buy an mp4 player. #Person2# advises #Person1# to buy a new cell phone instead which is easy to carry and has multiple functions.
documents: #Person1#: My mp3 player is broken, so I want to change it for an mp4 player. Can you offer any advice about which brand and model to buy?
  #Person2#: An mp4 player? why don't you buy a new cell phone? You can find an mp4 player inside any of the latest cell phones. mp4?
  #Person1#: Oh, that's a good idea. Perhaps I should have a try.
  #Person2#: Look at my cell phone. I can listen to music, watch movies, take pictures, play games, surf the web and download documents. It's just like a PAD.
  #Person1#: That's cool. I can use the computer and the internet pretty well, but I'm a little bit slow in the latest trends of digital products.
  #Person2#: That's Ok. you know, digital devices are becoming smaller and easier to carry, and they won't cost you too much.
  #Person1#: Yeah, if I buy a cell phone like this, I don't have to take a music player everywhere I go, and I can save the cost of buying an extra mp4.
  #Person2#: That's right. what's the flash memory of your old mp3?
  #Person1#: 256MB.
  #Person2#: Then any cell phone can meet your need because they generally have memories of over 512MB.