iPhone X randomly powers / shuts off

Go into your local Apple Support Store... They will diagnose your phone & if no software issues are found they will perform a DFU Reset & Restart as new iPhone!!

This made my phone worse & shutdown more !! Made new appointment within store & They had to REPLACE my phone due to Hardware issues or a defect... There was nothing more to do

Contact Apple support & they’ll give you the closest authorized dealer closest to you such as Best Buy or e.t.c... I don’t live in a Large city I had to go to a nearby city

Try this first.

Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Then, press and hold the Side button until you see the Apple logo.

If that does not help do a restore via iTunes and after that make an appointment at the Genius Bar for a hardware evaluation.

If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support

Contact Apple Care to verify if ANY support store is in your area and, if not they’ll send you the information to mail your Phone To Them

My iPhone X was plugged into power and shut itself off over night. So much for using this device as an alarm clock. Plus, the ear peice randomly doesn’t work when receiving phone calls. Have to use speaker to hear the caller. This phone seems to be very unreliable. Have to do a hard reset once a day??? Come on Apple. Considering getting rid of this phone.

I’m having the same issue it’s annoying disappointing & I’m very dissatisfied! The apple store has removed my soft ware & Restored my iPhone X as new iPhone & im continuously having the same issue that’s three times worse 😒

I too have the same issue.....

So how to prove that the phone is defective?

Not all of us live really close to an apple store. That’s not always feasible. There is a world outside of big cities.

Yeah don’t have those either.

Mail a thousand dollar phone? Thats the best customer service I could ask for!