I’ve had 3 cams for almost a year now. One outside. All have worked almost flawlessly. Uverse just replaced my router. Do I really have to setup each cam all over again? I never asked for an improvement. How about being able to do this from my phone…? If not, do I have to delete all 3 cams to reset them?
If your SSID and Password are the same they should all reconnect automatically. Otherwise, yes I believe you will need to set them up from new.
If you do need to set them up new (to connect to a new wifi SSID), you do not need to delete them from the app first. Once you reconnect them to the new wifi, they should link to the existing cam in the app.