You may have missed it yesterday because it wasn't shown off on stage, but apparently the new Lumia 950 and 950 XL flagships will be easily customizable with back covers. Finnish accessory maker Mozo already has an interesting lineup of back that include genuine leather. They replace the existing back case on the phones and fully support Qi wireless charging and NFC. They are not cheap though, €48/£40-€60/£50 is what you're looking at. Mozo cases: a choice between genuine leather or rubberized coating We saw some of the cases at the event yesterday...
Source: http://www.gsmarena.com/genuine_leather_backs_for_microsoft_lumia_950_and_950_xl_from_mozo-news-14360.php
