I read in a techcrunch article a statement by Bas van Abel, that Fairphone might be working on another phone for the US-market.
Nothing official or final though.
When — or even whether — there will be a Fairphone 4 is a question he isn’t keen to engage with. Clearly the hope is Fairphone 3 packs enough smartphone punch to go the distance. Though he hints it might look to offer additional smartphones in order to enter the US, a major market it’s so far not addressed at all.
*you find a list of reviews and a link to the article in this thread: