1. Download Proton VPN App: Visit the official Proton VPN website and download the iOS app.

2. Configure Account Settings:

   • Open the Proton VPN app.
   • Click on "Create an account" to enter your email and password.
   • Set a password if desired.

3. Set Up Session ID:

   • After creating your account, click "Get session ID" and enter your email.
   • Obtain a session ID (e.g., "your-session-id").

4. Access Proton Account Settings:

   • Go to Proton's account settings, typically under "Account settings" or "Social media".
   • Click on "Set up Proton account" and enter your email.
   • Set the session ID you obtained.

5. Connect to Proton:

   • Navigate to Proton's internal settings, likely under "Internal" or "Account settings".
   • Click on "Proton account" and enter your email.
   • Set the session ID as configured.

6. Use VPN Functionality:

   • Go to Proton's "Go to Proton" page.
   • Select your account and click "Connect".
   • Test by sending a short message (e.g., "Hello, friend!").

7. Additional Considerations:

   • Country Code: Customize your settings to your preferred country.
   • Social Media Integration: Enable Proton for your browser if needed.

8. Testing:

   Open Proton's browser and type a short message to ensure encryption works.

By following these steps, you should successfully set up and use Proton VPN on your iOS device.