I signed a service contract with ADT in July of 2003. In July of 2005, we moved the mobile home that the system was installed in. I had forgotten about the three year service agreement, and thinking it was just a two year, I contacted ADT to see about cancelling the service. Of course they let me know that I still had another year to go, which was fine. I told the service representative that we were thinking about not having a land phone line put in at the new location, and I was told that they could work with that by installing a cellular unit if need be. The representative had me sign the paperwork to have the cellular unit installed. I was told that it was standard procedure, just a modification for the system installed in the home already. I asked what we should do if we decided to go ahead and have another phone line connected, and I was told that if we changed our minds about the phone line after the move, just to let them know and they would take care of it. Either way, I just needed to contact them after the move so they could get things going again. I also asked if I would still be able to cancel the contract after the next year was up if we felt we no longer needed it, and I was told that there shouldn't be a problem with that. After the move (we did end up having a land line put back in) I began to be double billed for services. The company was billing me through both my old address and the new address. It was several months before they corrected this. Finally, at the end of the three year contract period I contacted ADT to let them know that we no longer needed the system. I was told that the contract was not up, because ADT considers ANY move to be the start of a new contract, and that because we had moved the service to a new address the year before, in order to cancel I would still have to pay several hundred dollars in early termination fees. It looks as if they are considering the papers the rep. had me sign to add the cellular unit as a new contract, which is NOT what I was told at the time. The representative had told me the paperwork was just for a system modicfication. If I had cancelled the contract that summer, the early termination fees would not have been near as much as they will be now, because of ADT's claim that this is a 'new' contract, started just last year. In retrospect, I would have been much better off to have cancelled last year and paid the lower early termination fees. Actually, I suppose I would have been much, much better off to have never done business with ADT.