https://wccftech.com/galaxy-note-10-no-headphone-jack-explained/

The Galaxy Note 10 and Galaxy Note 10 Plus have finally been unveiled and unlike the previous generations, the latest series has parted ways with the headphone jack. This might come as a shock to Samsung fans, as the South Korean giant actually used to poke fun of Apple for ditching the port and now it has gone down the same road. The company claims that it had to make this decision to fit in other things and consumers may or may not buy this explanation, but here is it.

The new Galaxy Note 10 and Galaxy Note 10 Plus only features a USB-C port and included with the phone are USB-C headphones. However, for those who want to use the wired headphones they already own, they will have to buy a USB-C to headphone adapter. According to a Samsung spokesperson, the company let go of the 3.5mm socket because it needed space for the marginally larger battery and better haptic feedback.