frozen

If your iPhone won't turn on or is frozen, try the things outlined in this document --> If your iPhone won't turn on or is frozen - Apple Support

Sections:

- If your screen is black or frozen

- If your device still won't turn on or start up

- If your device turns on but gets stuck during start up

- If you need more help Contact Apple Support Apple Support

See what you can do in such a situation:--> If your iPhone won't turn on or is frozen - Apple Support

If the issue persists, it might be a hardware (battery? screen? other internal component?) failure but we, just users like you, cannot diagnose that issue remotely, sorry.

I suggest that you make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> Apple – Location Selector. After checking it out, they'll give you all the available options.

Regards

Giulio

(*) You can do it:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above;
• Using the "Apple Store" app, available and downloadable from AppStore.