BD INJECT is a free VPN client for Android that offers secure surfing using UDP and VPN. It also comes with a custom request header and a host checker to access blocked websites behind firewalls. With BD INJECT, users can get a free unlimited VPN server without any username, password, registration, or bandwidth limitation. The program is easy to use and does not require root access.

One of the main features of BD INJECT is the custom request header, which allows users to modify requests easily.

However, it should be noted that disconnecting the VPN can be tricky, and users may need to use on/off data to force-stop the VPN.

It is a great option for those looking for a free and unlimited VPN server on their Android device.