Cant access Outdoor cam with att network

If im home connected to wifi i can access the outdoor cam with no problem, if i turn off android phone wifi or at my job, cant connect live to outdoor cam,have message to turn onoff camera or reboot router,at moment of test my phone download was 25mbps/upload 7mbps,my home wifi 115mbps/10mbps. I can connect to the other v2 cameras like a lighting with wifi off.the hub is 10ft from the camera and the wifi repeater that the hub is connected is running at same down/up speed as the router when tested with speedtest .any help