Why does my phone rattle when it vibrates?

At this point, your iPhone X is probably still under warranty. If you have easy access to an Apple Store, I would make an appointment and have them take a look. Make sure you back up your phone first because if Apple decides to replace it, they won’t do anything to retain your data.

If going to Apple isn’t an option (which is your best bet for sure) then just open it up and see what’s inside. I open iPhones every day and it is not uncommon for there to be a screw loose. The iPhone X in particular is pretty flimsy inside near the top of the phone. You will lose some waterproofing when you open it, but other than that it isn’t a huge deal to open and iPhone X with a little bit of heat and some patience. If you do it, then you will likely get declined by Apple for any problems in the rest of your warranty period.

"Hi Michael,

I guess that i have the same problem. Could you tell me if you fix your Iphone?"

y does apple have to make 1k phones so cheap. like at least make the screws a little tight. i’m started to hate how apple try’s to save every penny.

My father is having the same issue with us iPhone XR and we are confused. I’ve tried turning it of and on, turning vibration off, airplane mode, but nothing works.

See a lot of people having this issue. Go to settings and type in sound at the search bar at the top, type sound, tap ringer and alerts. Scroll down to the bottom and turn off sound and haptics. Thank me later.