Here’s how to turn on restrictions on an iPhone, giving you control over certain apps, content, and features:

How to Enable iPhone Restrictions  

Screen Time is built into the Settings app. Here’s where to find it so you can configure parental controls and other restrictions on the iPhone:

1. Open Settings: On your iPhone, click on the “Settings” app (the gray gear icon).

2. Navigate to Screen Time: Scroll down and tap on “Screen Time.”

The 3. Turn On Screen Time: If Screen Time is not already turned on, tap on “Turn On Screen Time.”

4. Set Up Passcode: You will be prompted to set up a Screen Time passcode. This is a four-digit code that will be used to make changes to Screen Time settings.

5. Access Content & Privacy Restrictions: Within Screen Time, tap on “Content & Privacy Restrictions.”

6. Turn On Restrictions: Toggle the switch next to “Content & Privacy Restrictions” to the ON position.

7. Customize Restrictions: Now you can customize the restrictions for different categories:

  * Allowed Apps: Select which apps can be used on your iPhone.

  * iTunes & App Store Purchases: Set restrictions on purchases, downloads, and in-app purchases.

  * Web Content: Filter websites based on age-appropriate content.

  * Privacy: Restrict access to location services, contacts, photos, and other personal information.

  * Other Restrictions: Set limits on other features, like Siri, FaceTime, and iCloud Drive.

8. Apply Restrictions: Once you’ve made your selections, the restrictions will be applied to your iPhone.

9. Modify or Remove Restrictions (If Needed): To modify or remove restrictions, return to the “Content & Privacy Restrictions” settings and use the Screen Time passcode to make changes.

Note: 

• The Screen Time passcode is crucial for changing these settings. 

• Ensure to keep the passcode safe and not share it with anyone.

• These restrictions are designed for parents to control their children’s iPhone usage. It’s important to use this feature responsibly.

Now you’ve successfully turned on restrictions on your iPhone, giving you control over various features and content!