How to downgrade from Marshmallow 6 back to Lollipop v5.1 Samsung J5

[AC Question]

Morning

My Samsung J5 has Marshmallow 6 on it and I want to go back to Lollipop v5.1.

Bearing in mind I'm a novice with android, are there any instructions on how to downgrade. In my opinion Marshmallow 6 is just awful.

thanks

 

[xandros9]

It's a kinda complex process, if possible, and I think it may be better to try to see why Marshmallow is awful to you and see what we can do to fix it.