Chosen Solution

Hello.I have an iPhone X (i think) which won’t turn on. Is there a way to check which version of the X it is (X, XS, XR), by opening it? I’m thinking about if it’s possible to look at the different components inside, to figure out if it’s just a regular X or one of the mentioned one above.Thank you.

They are physically different. Look at the camera and antenna separation lines.