“iPhone SE (2022) right side of screen not responding to touch after 18.3.1 update: iPhone SE (2022) right side of screen not responding to touch: I did the 18.3.1 update and since then my right side is no longer responding”
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Force Restart your iPhone:
Being the screen is not responding after an update, perform a Force Restart: Force Restart iPhone - Apple Support
also…
Report this to Apple...
Do your Part: Provide Apple with feedback on this, letting them know about this issue. Apple may not get back to you directly, but the more feedback they receive on this, the more they will know what is occurring, and what bug fixes to include in updates to come. Apple will know nothing of this, if you don't report it to them.
- Go Here: Feedback - iPhone - Apple
- Select: "Bug Report" for the "Feedback Type"
- Comment: that this all began after installing an update. Include the URL of this thread
- Proceed from there as necessary