It could be a couple reasons.
1. The camera device got interrupted. For example, a different app launches itself on the camera device, such as the incoming call or the calendar alarm/reminder... This will kick the camera app to the background and interrupt the on-going surveillance. The solution is to remove the sim card and do a factory reset.
2. If you see a "red exclamation" mark on the viewer before, it means peer to peer connection is not established.
Please check the camera device and confirm if it is still running. Then restart the camera device. If it still does not work, please email
sup...@wardencam360.com.