they can be very annoying (attack dialing several times a day), but they really work for bell. they probably asked for a cell number at the time the order was placed.
i've gotten some very annoying calls from them, outside business hours (8:00 am sat/sun). very unprofessional of them, so i called their office back and cancelled the service, as well as complaining loud and long about the calls.
Ya. It's quite annoying to receive a strange call from this strange number. I didn't pick up. Turn out it was from Bell for the up coming installation. They already sent me two emails before this. This is too much while they will do nothing if it is for a third party ISP. Won't even show up most of the time for their customers. [***] Hell.