What do u mean trade? like trade with another person, or trade in? because if you were to trade with another person i hope you are going to get some cash as extra, because everywhere the w600 is at a higher price, including ebay. I would only switch phones if you really need the 220's pda functions and such, but as far as sound quality, I think a phone designed for mp3 would do much better than one designed in a business perspective.