The passcode on an iPhone is the primary cryptographic key that secures the device’s local data and grants access to highly sensitive Apple ID parameters. In enterprise, educational, or shared-device deployments (such as retail point-of-sale systems), allowing an end-user to change the device passcode can result in an immediate loss of administrative control. If an employee alters the passcode and forgets it, or maliciously changes it before returning a provisioned device, IT administrators may be forced to perform a complete Device Firmware Update (DFU) wipe, resulting in the loss of unsynced data and significant downtime.
This guide explains how to completely disable ‘Passcode Changes’ system-wide on an iPhone using Apple’s built-in Screen Time restrictions, explicitly preventing any user from altering the local device PIN or biometric settings.
Disable Passcode Changes via Screen Time
By restricting passcode modifications via Screen Time, iOS completely removes the “Face ID & Passcode” (or “Touch ID & Passcode”) menu from the main Settings app, neutralizing the ability to alter the cryptographic unlock keys.
- Unlock the iPhone and open the main Settings app.
- Scroll down and tap on Screen Time.
- If you haven’t already, tap Turn On Screen Time and follow the prompts. (For maximum security, ensure you tap Use Screen Time Passcode to set a PIN that prevents unauthorized changes to this restriction).
- Tap on Content & Privacy Restrictions.
- Toggle the main Content & Privacy Restrictions switch at the top to the On (green) position.
- Scroll down to the “Allow Changes” section and tap on Passcode Changes. You will be prompted to enter your Screen Time passcode.
- Select Don’t Allow.
Verify the Configuration Lockdown
When you select “Don’t Allow,” the iOS kernel immediately hides the passcode configuration payload and revokes write privileges to the Secure Enclave’s PIN management interface for the current user session.
To verify the lockdown is active, return to the main Settings menu. Scroll down to where the Face ID & Passcode (or Touch ID & Passcode) menu normally resides (typically below the Siri & Search or Emergency SOS options). The entire menu item will be completely absent from the Settings list. The user cannot change the PIN, cannot add new fingerprints, and cannot scan new faces. The endpoint’s primary unlock mechanism is now securely locked down against unauthorized tampering.