Boot up your Firestick, open Settings -> My Fire TV
Go to Developer Options and set Apps from Unknown Sources to ON
Go back to Home screen buy pressing Home button on Fire TV remote control
Switch to magnifier icon by pressing left and search for Downloader app
Select Downloader app
Click Get to install Downloader app
Click Open to run Downloader app
Switch Browser from left pane, type the following address: https://trust.zone/vpnzones then press Go
Click ics-openvpn-latest-stable.apk to download it
Install file by clicking INSTALL button
After install click DONE then click Done again. Do NOT open the app yet.
In Downloader app Browser select desired VPN location and click it to download OpenVPN config file (.ovpn file).
Click Done after OpenVPN config file (.ovpn file) downloading is complete.
Navigate and click check mark icon at right top of screen to apply and save VPN connection profile.
Select VPN connection profile you've just created and click it to connect.
Click OK to accept connection request.
Type your VPN username and VPN password, enable Save Password option and press OK to connect.
Message Initialization Sequence Completed in OpenVPN Log means you're successfully connected to Trust.Zone VPN.
Your IP: x.x.x.x · Japan · You are in TRUST.ZONE now! Your real location is hidden!