I'm sorry to say, but Sidekicks cannot be "unlocked". They do however have an option to search for available networks, and use one of them to place phone calls. This is useful if you are in an area that Tmobile is not available, for example. Your cingular
sim card will not work in the device, trust me, I've tried. I've been using a sidekick for 3 years now, and that tip that you posted about bypassing the privacy code doesn't work either.....I just tried it. Your best bet is to buy an average used sidekick, and just wait to use it until you switch to Tmobile.