I figured I'd see what the "hidden menu" was all about, so I went ahead and enabled it. After I accessed the data-settings (##data#), my 3G signal has been real screwy ever since. I'm lucky to get 1 or 2 minutes out of it, before it drops signal. And when it is working, it is extremely slow. All I did was open the data-settings, and I didn't touch a single setting. I saw what there was and just hit the back button, then my phone restarted on its own. I've seen other complaints about the same exact situation, but have yet to find a true answer on how to fix the problem. And yes I'm aware...."it's hidden for a reason"...LOL
A few people suggested activating an old phone to your number, then to reactivate the Fascinate so that the network/data settings are re-flashed. But I don't have another phone I could use.