for HTC U12 Plus Type C to 3.5mm Jack Audio Adapter+RCA Adapter Audio Cable NEW | eBay
Amazon.com: USB-C Headphone Adapter Compatible with HTC U12 Plus Phone, Earphone 3.5mm Jack Charger Port Splitter Mic Support Hands-Free Type-C Headset Adaptor : Electronics
Amazon.com: VOLT PLUS TECH USB C to 3.5mm Headphone Jack Audio Aux & C-Type Fast Charging Adapter Compatible with Your HTC U12 Plusand Many More Devices with C-Port : Electronics
GinTai Dual Sim Card Tray Slot Holder Adapter Replacement for HTC U12 Plus U12+ (Blue)