Netflix is only in some countries. Be sure to ask Netflix if they are in your country.
As to the model number question, we always ask Samsung to clear that up. Installing the wrong firmware by force can result in a player that needs to go to the shop and my bet it won't be free.
I have a Samsung BD-E5300 BluRay player that I purchased in Denmark in june 2013. The only app that is preinstalled is Youtube. Internet connection is Ok and the Youtube app works OK. The SW version is 1014.1. But it says E5400. Not E5300. Is it possible to get the Netfix app and the Smarthub app in a SW update or from an install from the internet?