How do I enable VPN in the Opera browser on my iPhone?

To enable the VPN in the Opera browser on an iPhone, one must first ensure that the latest version of Opera is installed from the App Store. Upon opening the browser, navigate to the Opera menu by tapping on the "O" logo at the bottom right of the screen. There, find the settings option and select it. In the settings menu, there should be a section for VPN which might prompt a setup process. One will need to enable the VPN by toggling the switch to 'On'. After this initial setup, it can often be turned on or off easily within the browser's setting menu. It's important to note that if one cannot find such an option, they might need to check if their region supports Opera's free VPN service, as it may not be available in all countries.