May 28, 2020
Mozilla's Firefox VPN is now out of beta on Android Jul 15, 2020 FlowVPN - Unlimited Internet - Apps on Google Play May 28, 2020 (Android) User Guide | FortiClient 6.0.0 | Fortinet
If you want a permanent VPN connection you should use Always-On VPN. The configuration process may differ slightly depending on the version or variant of Android used. First open Settings > More settings > VPN and then select Add VPN network .
L2TP/IPsec Android 4.X Setup Instructions - Giganews
How to set up a VPN on an Android smartphone or tablet
WARNING: Many Android 4.0.x Ice Cream Sandwich devices are unable to establish a L2TP/IPsec connection. This is a known issue with Android - Ice Cream Sandwich. Google is currently working on an update to address this problem.