Phone manufacturers have largely moved away from the traditional 3.5mm headphone jack in favor of USB-C ports. However, the question of which option provides better audio quality is not as simple as comparing the two ports directly. For many years, the 3.5mm jack was a standard feature on nearly all smartphones, from iPhones to Android devices. This small, round connector delivers an analog audio signal after converting digital data from the phone. Its simplicity and widespread use made it a popular choice for decades. Apple removed the 3.5mm jack from the iPhone 7 in 2016, promoting the use of its Lightning connector instead. Google and Samsung followed suit in later years, and regulatory changes eventually pushed Apple to adopt USB-C with the iPhone 15. However, some manufacturers, like Sony, continue to use the 3.5mm jack, as seen in the Xperia 1 VIII released in 2026, while a few budget phones still offer the traditional port. The key difference between the two connectors lies in where the audio conversion happens. With the 3.5mm jack, the phone converts digital audio to an analog signal using a built-in digital-to-analog converter (DAC) and headphone amplifier. The quality of these internal components greatly affects the sound. With USB-C, the digital signal is sent through the port to an external DAC, which is often found in the headphones or an adapter. This means the conversion occurs outside the phone, which can either improve or degrade sound quality depending on the quality of the external components. Some phones also support a feature called "Audio Accessory Mode," which allows the USB-C port to function like a traditional audio jack, bypassing the need for an external DAC. Neither connector guarantees superior audio quality on its own. A high-quality USB-C adapter with a good DAC can outperform a phone's built-in 3.5mm output, especially when used with premium headphones. Conversely, a phone with an excellent internal DAC and amplifier can deliver impressive sound through the 3.5mm jack. The overall experience depends heavily on the user's existing equipment and the quality of the components involved. For most listeners using average gear, the difference between the two might be minimal. However, USB-C has greater potential for high-quality audio when paired with the right accessories. Despite the rise of USB-C, the 3.5mm jack remains a convenient and widely compatible option. It is still found in many devices such as cars, laptops, TVs, and speakers, allowing a single pair of wired headphones to work across multiple devices. This universal compatibility is one reason the 3.5mm jack continues to be relevant and popular. While USB-C has greater potential for audio quality, especially with premium external hardware, it requires users to invest in additional components. For the average user, the difference in sound quality may not be significant, but the 3.5mm jack still offers a simpler, more universally compatible experience. Ultimately, neither connector is inherently superior in every situation, but the choice often comes down to user preference and existing equipment.