Galaxy A15 doesnt have a port for 2.5mm wired headphones. Wireless blueyooth only i guess and it wont connect with all brands of wireless earbuds either
They make USB-C to 2.5mm adapters, like this https://a.co/d/25fI061 or this https://a.co/d/94AU8fi I don't know why it won't connect with all brands of wireless earbuds, Bluetooth is Bluetooth.
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