(1)Close the phone to the device and check out the green light. (2)If the green light alaways ON, it means the other phone is connecting. Disconnect and restart the device. (3)When the mobile phone cannot search for the device, check your phone whether the Bluetooth is turned on first. If still can not connect with your device, please close the APP and open it again, and try to connect again. Only one device can be connected at a time.