Uninstall IOS 17

Sorry, but downgrading to a previous iOS version is not supported.

But, to rule out a software issue, you can reset your iPhone to factory settings on your computer, which will download and install a completely new version of the latest iOS.

Set up your iPhone "as a new device" and test it after that, without using the latest backup.

If the phone works again as expected, use the backup to restore your data.

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Sorry, no downgrading the operating system is not supported.

What issues are you having?

chichimosi Said:

"Uninstall IOS 17: can i uninstall IOS17 my iphone 11 is acting very weird now"

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Uninstalling iOS17:

No. This is not an option. The iOS cannot be downgraded. This all has to do with how the iOS is designed. Downgrading it would take away the most-recently installed features, thereby creating incompatibility with Cellular standards.