I need to remove rapid security 16.5.1(c) please help me.

In the event of problems, remember that you can uninstall Rapid Security Responses (but not regular updates) just as quickly as you install them (see “What Are Rapid Security Responses and Why Are They Important?”

• iPhone or iPad: Navigate to Settings > General > About > iOS Version, and then tap Remove Security Response. Tap Remove to confirm.
• Mac: Go to System Settings > General > About, click the ⓘ next to the macOS version, click Remove & Restart, and confirm the action.

iOS/iPadOS 16.6 is current. If your iPhone has not been updated to this version, you should do so as soon as practicable - as this version includes essential security and functional fixes that are not incorporated within the prior Rapid Security Response (RSR) update.

Otherwise, if an applied RSR update is causing operational issues, the update should be easily removable:

Settings > General > About > iOS Version > Remove Security Response

If you cannot remove the RSR, your only option may be to update to iOS 16.6.

i cant remove ios 16.5.1(c)

it won’t get pass there you had any luck with yours?

If your device is managed by your work or school, they may restrict the ability to remove these updates. In my org, we do not allow removal of the RSR updates.