This tutorial video will show you step by step how to unlink (disconnect / remove) your Facebook account from Instagram on a Android smartphone.
This tutorial should work for all Android smartphones such as the Samsung Galaxy, Sony Xperia, Huawei, Lenovo, Motorola Moto, OnePlus X, Google Nexus, HTC, LG, and many other smartphones running Android 4.1 or higher (Jelly Bean (4.1 - 4.3.1), KitKat (4.4 - 4.4.4), Lollipop (5.0 - 5.1.1), Marshmallow (6.0 - 6.0.1)).
You can find the new updated version of this video here: https://www.youtube.com/watch?v=VjXSg8jCxDI
You can find this tutorial also here: https://www.easytechguides.com/unlink-instagram.html