Most Bluetooth speakers can only connect to one phone, not several at the same time.
When you want to change the connection of another phone, the phone connected to the Bluetooth speaker must first disconnect, and other phones can connect.
Some mobile phones often even Bluetooth audio, sometimes even after the sudden can not control the speaker, there is no sound. Adjust what Settings do not work, perhaps the Android mark is wrong, perhaps the phone's Bluetooth connection has been changed, not the media form of connection, repair is more troublesome, it is better to restart directly, empty the memory data and garbage. When the phone is turned back on, it connects smoothly, and as before, music plays without delay. After all, Bluetooth is not WiFi, there are more restrictions, transmission distance, transmission mode, transmission speed, etc., each limitation can make Bluetooth connection transmission stretched, can not play. However, Bluetooth also has a better place than WiFi is that it can be connected without the Internet, although the effective distance is ten meters, but this ten meters is enough, and it can also achieve more data transmission and media sharing.
No, the collection speaker is generally Bluetooth connected to the phone, Bluetooth can only connect to one device.