I've been using S3 ([i9300](https://wiki.lineageos.org/devices/i9300)) with the release date as May 2012 along with lineageos for almost 10 years. This guide is for HTC One ([M8](https://wiki.lineageos.org/devices/m8)) though, but the process is _nearly_ the same for your model as well. Both devices are still one of the most popular used models according to [stats.lineageos](https://stats.lineageos.org), m8's release date is March 2014, check if your phone is supported [here](https://wiki.lineageos.org/devices), check "Show discontinued devices" if you're okay to run the outdated version.
The [wiki](https://wiki.lineageos.org/devices/m8) page is more than enough but it's better to have everything in one place rather than following a lot of external links.
- Once you have installed everything successfully, run `adb reboot`.
# Install F-Droid & SilentDragonAndroid
> F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
- To install SDA please follow this [link](https://git.hush.is/jahway603/sda-fdroid/raw/branch/master/fdroid/repo?fingerprint=A0C4BB434AAE5CF89D59D79A20625B8FC4ED03FE3C27093C7FCB68567DA2FB0C) from [git.hush.is/jahway603/sda-fdroid](https://git.hush.is/jahway603/sda-fdroid) on your device and open it with F-Droid.