Download Psiphon Handler APK for Android.
Install the downloaded APK on your Android device.
Launch the Psiphon Handler and do the following setup;
—–Uncheck the port box
—–Proxy type should be: Dual Real Host
—–Proxy server should be: datareset.mtnonline.com/#Xstring
—–Real proxy type must be: HTTP
—–Real proxy port must be: 80
Next, navigate to “Options” and set your region to be “United States“.

Get full details:
https://leezloaded.com/2018/12/how-to-activate-mtn-unlimited-free-browsing-with-psiphon-handler/