Step 1: Enable Apps from Unknown Sources By default, Firestick doesn’t allow you to install apps from unknown sources, i.e. sources other than the Amazon App Store. To enable this option, go to Settings > My Fire TV > Developer Options and toggle on Apps from Unknown Sources.
Step 2: Install Downloader App Next, you need to download and install the Downloader app on your Firestick. This app allows you to download files from the internet and install them on your device. You can get the Downloader app from the Amazon App Store.
Step 3: Download So Player APK File Now, launches the Downloader app, and enter the following URL in the address bar: https://m.apkpure.com/soplayer/com.soplayer.android. This will take you to the download page of So Player. Click on the Download button to start downloading the APK file.
Step 4: Install So Player Once the download is complete, click on the Install button to install So Player on your Firestick. This may take a few seconds to complete. Once installed, you can launch So Player from your app library.
Step 5: Set Up So Player When you launch So Player for the first time, you’ll need to enter your username and password to log in. You should have received these details from your IPTV service provider. Once you’ve entered your credentials, you’ll be able to access the IPTV channels and on-demand content on So Player on firestick.