There's life in the old girl yet! Although the Samsung Galaxy S2, model i9100, is now over 6 years old and has only got 1GB of RAM it can still hold its own on Android Nougat 7.1.2 as this screenshot shows... I do not intend to go into a step-by-step tutorial but will point you in the right direction and give you a few links for downloads and instructions since this is for competent and experienced users only. Suffice to say that for those of you that still have the trusty and reliable Galaxy S2, the Lineage ROM on Android 7.1.2 will not disappoint you as it offers a whole host of Nougat features and runs fast and smooth. Here is a video tutorial and some useful links... (There are useful download links with the video) Lineage ROM download for the i9100... https://download.lineageos.org/i9100 Google apps download, (I used the nano for ARM 7.1)... http://opengapps.org/ Good luck and enjoy! ironass motto... "Flash in haste... repent at leisure"