It is possible to use an old phone with Videotron’s wireless network. You must first make sure that your phone is "unlocked" for activations on different networks. Videotron does not proceed with unlocking of phones from other providers. You will have to ensure that this is completed before visiting one of their sales locations. An agent will also check if your phone is compatible with their network. If it is, then you can purchase a sim card to subscribe to their service.