I solved the double data plan dilemma by removing the data portion from my smartphone plan and applied the money saved there to the data plan on my Mifi (it was about 1:1). I really don't do email or web browsing anymore on my smartphone anyway now that I have a Pocket eDGe, but if I need wifi access on my smartphone, I just turn on my Mifi and the phone connects through that (of course, at home and where there's a hotspot my phone can use that wifi directly). It would be ideal if the eDGe could accept ad hoc network connections, but meanwhile I have a workable arrangement that costs me no more than what I paid originally for my smartphone data & voice plan.