Most modern browsers implement the geolocation API as defined by the W3C which enables browsers to detect the geographic location of the device. This enables web services which rely on location information to function correctly. The specification doesn't define the location sources but the following are commonly used:

Why doesn't my iPhone use the VPN for the Internet I understand! You should check the settings first in your iPhone whether they are being configured correctly or not. If it is showing your local IP rather than the masked one, then probably your settings are incorrect (may be the case). So what How To SETUP AN iOS 12 VPN Connection FOR iPhone & iPad Jan 07, 2019 VPN Master Unlimited proxy for iPhone - Download.com

Despite its popularity in the Americas, Hola! VPN was repeatedly shown to expose its users to danger, rather Hotspot Shield Iphone 5 Not Working than protect their private data. Through a combination of misrepresentation, false marketing, as well as a service that purports itself

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If you use a VPN on your device and get connection errors from Duo Mobile, you can disable Wi-Fi assist by doing the following: Navigate to Settings > Cellular or Settings > Mobile Data. Then scroll down and tap the slider for Wi-Fi Assist. If pull-to-refresh does not work: How to configure VPN access on your iPhone or iPad | iMore Jul 07, 2020