Bluetooth is only required for the initial setup of the streamer. It therefore needs to be 'on' during set-up, and the Presto App needs to have permission to use it. On iOS if you have previously said 'no' to the Presto Music app having access to bluetooth, this can be changed in the iOS Settings app then scrolling down to the Presto Music app. If you have 'hidden' your home Wi-Fi network, you will temporarily need to unhide it to go through the initial set-up. Because the Streamer and controller app need to be able to communicate with each other and be on the same network, please ensure your device is not using a VPN when trying to set-up or use the Presto Music Hi-Res Streamer.