Been holding on to that now-antique EDGE device to keep from extending your contract with AT&T? Well, if you've been experiencing some sluggishness -- and not just general EDGE sluggishness, mind you -- you might have more to blame than just those recent outages. Open for Business reports that AT&T has been quietly lowering EDGE signal strength to give more 3G love to all you iPhone 3G and Bold users. To add to the shadiness of the situation, AT&T reps are all offering up the same solution -- buy a 3G device. Unsurprisingly, AT&T's Mark Siegel has denied Open for Business's claims, and says that the mega-carrier is not requiring anyone to switch to a 3G phone. We'll put on our Sherlock Holmes outfits and try to do some digging, but it's not like we actually expect these guys to admit to a move that would definitely lead to a lot of backlash.