In this guide
No. You cannot plug USB-C headphones directly into a 3.5mm phone — the connectors are physically incompatible. You need a USB-C to 3.5mm adapter with a built-in DAC, but even then your phone must have a USB-C port, which most 3.5mm phones do not.
- Your phone has a USB-C port alongside or instead of 3.5mm
- You use a quality USB-C to 3.5mm adapter with a built-in DAC
- Your phone supports USB audio accessory mode
- Your phone only has a 3.5mm jack and no USB-C port
- Your adapter lacks proper DAC implementation
- Your phone does not support USB audio accessory mode
Why They Are Incompatible
USB-C and 3.5mm audio jacks use completely different physical connectors and communication protocols. A traditional 3.5mm headphone jack carries analogue audio signals. USB-C carries digital data and requires a DAC (Digital-to-Analogue Converter) to produce sound. There is no passive adapter that can bridge this gap — the conversion has to happen somewhere.
Most phones with a 3.5mm jack were made before USB-C became standard. That means they typically have a Micro-USB port, not USB-C — so a USB-C to 3.5mm adapter does not even physically connect.
When an Adapter Can Help
If your phone has both a USB-C port and a 3.5mm jack — or USB-C only — you can use a USB-C to 3.5mm adapter to plug in standard 3.5mm headphones. That is the more common use case. For the reverse (USB-C headphones on an older device), the same adapter type is involved but the direction of the problem is different.
To use USB-C headphones on any phone, that phone must have a USB-C port. If it does, a quality adapter with a built-in DAC and TRRS support for microphone passthrough will usually work. Check out our guide on whether USB-C can connect to HDMI for more on how USB-C handles different signal types.
| Setup | Works? | Need | Note |
|---|---|---|---|
| USB-C headphones → 3.5mm-only phone | No | Nothing will work | No USB-C port available |
| USB-C headphones → USB-C phone | Yes | No adapter needed | Phone must support USB audio |
| 3.5mm headphones → USB-C phone | Yes | USB-C to 3.5mm adapter with DAC | Use a quality brand adapter |
Adapter Quality Matters
Generic adapters frequently fail because they skip proper DAC implementation or do not support the TRRS wiring needed for microphone use. Stick to adapters from reputable brands or those recommended by your phone manufacturer. The USB Implementers Forum maintains the official USB audio specifications if you want to check device compliance.
Also note that using the USB-C port for audio means you cannot charge at the same time unless you use an adapter with a pass-through charging port. For more on USB-C signal limitations, see our article on whether USB-C supports video output.
Common Failure Points
- Phone has Micro-USB, not USB-C — adapter will not fit
- Phone has USB-C but does not support USB audio accessory mode
- Adapter is passive with no DAC — produces no sound
- Microphone does not work due to missing TRRS support in the adapter
Bottom line: Using USB-C headphones on a 3.5mm phone is not possible without a USB-C port on the phone itself. If your phone only has a 3.5mm jack, your only options are wired 3.5mm headphones or wireless Bluetooth headphones. If your phone has USB-C, a quality DAC adapter will let you use either type.