HTC U12+‎

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Why doesn't my own digital 3.5mm headphone adapter work on my HTC phone?

We highly recommend that you use the HTC USB-C Digital to 3.5mm Audio Jack Adapter. This adapter is available in-box for certain phone models or may be purchased separately on the HTC website.

Before you use the adapter, update the HTC Audio Jack Adapter Toolkit on your phone to the latest version from Google Play Store. After updating the toolkit, connect the adapter with your 3.5mm headset to your phone. The toolkit will check for the latest firmware update for the adapter and will show you instructions on how to update it, if needed.

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