Here is a way to get free sandwiches from Burger King. Just take part in a 10min telephone survey and you get a free whopper or a chicken sandwich the next time you visit Burger King. Sounds yummy...What's better still is that there are no limits on the number of surveys you can do. So..Eat all you want..But wait, There is yet another easier way to go about this..This site has a useful tool that will generate the correct survey validation codes for you to use as often as you please.