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Ifixit gives fairphone 5 a 10/10 on repairability and maintanence
(www.ifixit.com)
This is a most excellent place for technology news and articles.
I use wired headphones and I use an aux jack in my car. I have a set of BT ones I use if i'm walking around but if I'm stationary (which is the case 90% of the time I'm using my phone) wired is better. Better sound, no battery to worry about failing, no BT delay turning everything you watch into a shitty dub.