Welcome, @Stick_upCam! This is not the experience we intend, and are here to help. It sounds like you've covered all the necessary steps to confirm network resources will work. If you have not already tried this, one option is to setup the Cam inside near the router, attempt to obtain a successful setup, then relocate it outside. It will automatically reconnect when plugged in again, or should remain connected if battery powered (depending on model).
Trying on 2 devices was a great step to cover. I recommend also ensuring bluetooth and VPNs are disabled on the mobile devices.
Depending on network and router type, there may be times where network settings need to be explored. Check out our help center article on ports for more information on network configurations. If you need more assistance with these advanced settings, our support team is always happy to advise further.