Speakers that plug in USB flash drives generally have AUX sockets or USB sockets, and some also have TF card sockets. If you want to play music on your smartphone, you can refer to the following solutions:

1: Purchase a dedicated AUX audio cable (as shown below) to connect the mobile phone and the speaker. The speaker adjustment mode is AUX mode. Just open the music player on the mobile phone and play music (this solution requires the speaker to support AUX mode).

2: Use mobile phone data cable: Plug in the mobile phone end of the data cable, adjust the mobile phone to U disk mode, insert the other end of the data cable into the USB interface of the computer, and then adjust the speaker to USB mode. Just play it (this solution requires the speaker to support USB mode and the phone to support U disk mode).

3: Transfer the songs on the phone to the memory card, then take out the memory card, insert it into the TF slot of the speaker, and adjust the speaker to SD card playback mode (the solution requires the speaker to support TF playback mode).

4: Purchase a 1/2 audio cable 3.5mm to double lotus cable (as shown below) to connect the mobile phone and the speaker. Adjust the speaker to the corresponding mode. Open the music player on the mobile phone and play music. (This solution requires the speaker to support this interface).

5: The above solutions are invalid. It is recommended to check the manual or consult the manufacturer and the audio seller for the accurate operation plan.