2 Sept 2019, 14:32

Hello @Yvonne-van-Noije.
I cannot answer your question regarding your iPhoneX. I use an iPhone 6s and a Quad Lock case and mount. I have used it for thousands of kilometers without and over heating or vibration problems. I have a usb charging point and have it plugged in, because like any phone gps, it uses the phone battery a lot. Hope this helps.
Quad Lock iPhoneX