not possible to go to an app or turn it off. even when i take te sim card out.

Try a forced restart.

• Press and quickly release the volume up button

• Press and quickly release the volume down button

• Press and hold the side button.

• When the Apple logo appears, release the button.

Force restart iPhone - Apple Support (IN)

vw98 Said:

"not possible to go to an app or turn it off. even when i take te sim card out.: i dit test to push the buttons everything."

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Troubleshooting a Frozen iPhone:

Try the Tips at these Apple Support Links:

• If the Screen isn’t Working on your iPhone or iPad - Apple Support

• If your iPhone is Stuck on the Apple Logo - Apple Support

• If your iPhone Won't Turn On or is Frozen - Apple Support

• If you Need More Help - iPhone - Apple Support