Through any Spypoint camera (cellular models), you will get photos remotely from the camera to your Spypoint app. To get the photos, Spypoint already added a SIM card inside the camera.
Your cellular provider doesn’t have anything to do with the provider that is used for your camera. The important thing is to check if that there is a signal strong enough from any provider to allow your camera to connect to that network. This is essential, as these cameras do not have the “roaming” feature that most cellphones have, and are unable to connect to all networks. So they strongly recommend checking the coverage maps for Verizon and AT&T to verify that the signal will be sufficient for consistent and reliable service.