Solved! Go to Solution.
Thank you for bringing up your issue with your uploaded photos on Facebook being in low quality.
Similar to our dear Samsung members reply here, it's nothing to do with your Samsung Galaxy device camera photo quality but due to recent Facebook updates to improve the user experience and a fast webpage loading time, Facebook compresses all images you upload.
Should you need further assistance and support, you may contact us on the online Samsung support channels below.
Hope we satisfied your query.