Post an iOS upgrade, is that it is recommended for you to perform a 'Settings -> Reset -> Reset Network Settings'. This is because iOS may not properly reauthenticate your WiFi profile connections. NOTE: You will need to know the wireless SSID/credentials to re-pair the device with your wireless router, after performing the reset.
If you do experience problems, we provide the ability via our website for AMX dealers/integrators to upload the TP4 file and configure Settings for any registered device. This can then very easily be applied to the device, using the 'TPCloud update' option within 'Settings -> TPControl'. This can all occur without the need for a site visit, provided your device has access to the Internet, and the dealer has configured the information.