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How to use earphone type c on samsung galaxy a11?

Hi, You may be able to plug the USB-C earphones into the USB-C port on the phone. I’m not sure if your model allows audio through the USB-C port or not as the user manual doesn’t show all the available settings. Go to the Settings > Developer Options > Media > Disable USB audio routing and check that it is NOT enabled. Here’s a video that shows how to get enable Developer Options. If the Disable USB audio routing setting is not there then I think that as you obviously cannot connect USB-C headphones to the headphone jack in the phone, you would need to use a 3.5mm male to USB-C female converter (you need to convert from an analogue signal to a digital signal) and they don’t seem to be available. At least I couldn’t find any.