I'm considering upgrading to a 3GS. I just haven't decided if the enhancements are enough to get me to bite. Part of this equation will be what happens to my old 16GB 3G. My son is dying for a new phone as his "ghetto" Nokia can't keep up with his 12,000+ text messages per month (using predictive text no less!) I would consider giving him my 3G, but I wouldn't want a data plan associated with it. Just using it in WiFi mode for any data would meet his needs. I've heard rumors that AT&T scans the network for iPhones and will automatically add the data plan to his line once a scan picks it up. Is there a trusted data source that can confirm this? Can it be avoided if I jailbreak it? I'm thinking I might need to jailbreak it anyway just to get it into a mode where everything else (text, WiFi) works while disabling any 3G or Edge data traffic. Just wanting to see if others have experience with this scenario.