To do these codes you must first turn your WebTV terminal off. When off, hit options three time then put in the following codes and then power your unit back on:

NOTE: the three lights on the front of your terminal will blink, telling you that you have properly entered the codes.

411           this gives you your browser tech info
217           gives you your dialing options
77437        gives you obscure dialing options
7744          allows you to dial toll free
32768        clears your dialing options
90210        gives you a webtv tour
07081969   old forced upgrade
1776          clears IP info
324            ???
021158       starts plus demo
061185       stops plus demo