Before switching back to my old phone (Droid X) for a couple of days I saw under the plan features there was the Mobile Hotspot Promo $0. When I switched back to my Thunderbolt it was gone. Now is this feature necessary for the Hotspot promotion. I have been using the Hotspot feature quite a bit and I am not looking foward to a suprise bill. Anyone else notice this feature on there accounts? Or had the same issue?