To obtain a free VPN on your iPhone 4,follow these organized steps:

1. Choose a VPN App for iPhone 4: Select a VPN service that is specifically designed for iPhone 4 users. This ensures compatibility and performance on your device.

2. Download the App: Install the chosen VPN app on your iPhone. Look for updates or specific packages that include the VPN for your model.

3. Check Features and Reviews: Review the app's features, such as ad-blocking and URL filtering, and read user reviews and ratings to ensure it meets your needs.

4. Enable Your Account: If the app allows, set up an account. Use a strong, unique password to protect your privacy.

5. Test Without an Account: Consider using a free VPN that doesn't require an account, especially if you want to avoid ads or restrictions.

6. Ensure Speed and Reliability: Opt for a VPN with decent speed or a paid version that offers faster connections.

7. Read Privacy Policies: Make sure the app's terms of service and privacy policies are clear, confirming it's suitable for online activities.

8. Consider Trial Periods: Look for free trials to test the VPN without committing to a subscription.

9. Check Compatibility: Ensure the VPN works on your iPhone 4, possibly by checking for an update or compatible package.

By following these steps, you can securely and effectively use a free VPN on your iPhone 4 to enhance your online privacy and browsing experience.