Some were the orignal and some cams were bought used a couple years ago without sims. I talked with advance tecjh support Friday and they said the same tbing, if I let my plan lapse more than 59 days they cancel the number, Sim is dead and its removed from my account. I told tnem others were not having this issue and they were uncertain as to how they were not expiring. I would hate to leave these cams up all year, I have 20 that use the data sim and its eaxpensive enough!