1. Download the App: Visit the Proton VPN website and download the iOS or Android app. Ensure you have the latest version for the best features.

2. Set Up Your Account:

   • Open the app and sign in with your Apple or Google account.
   • Set up a username and password for your account.

3. Configure Proton Account:

   • Click on the settings icon in the app.
   • Navigate to "Account" and select your preferred plan (Basic, Business, Pro) based on your needs.
   • Review the plan details and make sure it aligns with your requirements.

4. Authenticate Your Device:

   • Log in to Proton with your Apple or Google credentials.
   • Enter your device's password and username to confirm connectivity.

5. Select Your Plan:

   • Return to the privacy settings.
   • Choose your preferred plan (Basic, Business, Pro) to configure your settings.

6. Verify Privacy Settings:

   • Ensure cookies and other privacy settings are configured to meet your needs.
   • Review the privacy policy and terms of service to align with your preferences.

7. Connect and Use VPN:

   • Go to Proton's homepage and click "Use" or "Get Started".
   • Enter your credentials, including your Apple or Google account.
   • Begin browsing the internet as usual.

8. Optimize Performance:

   • Regularly check Proton's settings to adjust performance and reduce ads.
   • Look into security settings to ensure strong passwords and disable unnecessary security features.

9. Switch Devices:

   Return to Proton's settings, log in, and change your device ID.

10. Enable Security Settings:

    Navigate to privacy settings and enable "Security" to enhance your security.

11. Check Internet Connection:

    Test multiple devices to ensure stable connectivity.

12. Troubleshooting:

    If issues arise, return to Proton's settings and check for device connectivity or account errors.

By following these steps carefully, you should be able to effectively use Proton VPN.