A:Answer 1. Download the newest version of Miltiroom to your Android phone.
2. The Wi-Fi network for these speakers must be reserved for the speakers and your phone. Your controlling device must be the only such device on the network. Must have a private, secure wifi NETWORK not shared. Anyone with a Android phone running the Multiroom app WHO IS CONNECTED TO THE SPEAKER NETWORK can change the station.
I have proved this numerous times by bringing in a foreign phone, connecting it to the "house" Wi-Fi, launch Samsung Multiroom, and the foreign phone can see all 6 of my WAM1500 R1 speakers. Full control to change the music and ungroup speakers. Perhaps your customers are hijacking annoying speakers near their tables?
3. I can walk into a retailer with my S8+ and launch Multiroom, then control all the display tv and Wi-Fi speakers, but only if I have connected to the same Wi-Fi network used by the display speakers.
4. A great feature of these speakers is that they talk to each other, if on the same network. Connect to one, and you have access to the entire array. If you set up 2 speakers in Room A for Spotify, and Room B for rappers delight, I can come in behind you with my device and reset all speakers into a group and play country music. All I need is the Wi-Fi password. Havoc and chaos. Secure your Wi-Fi. All routers allow multiple networks. One of those networks should be private.