The built-in VPN solution used by Opera Software looks more like a proxy and works exclusively in the browser.
The built-in VPN in Opera 51 for Android should be enabled before you can use it. This can be done from Settings.
The app also has some additional options for more functionality:
You can set a desired connection area, bypass the VPN for a search, or use VPN only for private browsing.
See the presentation video
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