If you pay Windscribe anonymously and connect to the residential IP through a trusted VPN (Mullvad, Proton, IVPN) Windscribe will have no information about you.
To chain VPN connections:
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Use virtual machines. Connect to VPN on the host and oconnect to the other VPN inside the virtual machine , or bridge VPN through a virtual machine to another one.
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Hotspot or tether your connection through your phone while connected to the VPN and connect to the other VPN on the computer or phone.
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Set your router to connect to VPN by providing it with the OpenVPN, Wireguard configs. Then connect to the other VPN on your device.
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Phones:
Currently there is no way to chain 2 VPNs on Android. However RethinkDNS has stated that the next update (v055o) to the app will provide the ability to chain VPNs.