We’re in the process of recycling phones. When the oldest phone is ready to bite the dust, I get the new phone (because I need high tech equipment for my work), Andrew gets my phone, and my mother gets his.
So with the latest upgrade to iPhone X (which I love), I found that I was no longer able to use it as a hotspot for my laptop (which I didn’t love).
After researching, I found the problem. You can’t have any spaces or special characters in your phone’s name. I had both.
If that doesn’t work you can try attaching the phone via USB. That prompts your Surface Pro to do some additional setup and establishes a “trust” between the devices. You can also go into Bluetooth settings and pair the Surface Pro to the iPhone.