I've just recently got an x3 / desk dock combo. Following the advice in the thread above (the sole place on the internet which seems to address / answer this question...) I've likewise found the ethernet connection works - set to Airplane mode, into the Desk Dock, and Edge suddenly becomes very snappy indeed.
Which is lovely but... ...how come the phone / desk dock don't show on the network on any other machines? It would be useful to be able to transfer files to/from the x3's storage but this doesn't appear possible (without plugging it into the host PC via USB, which is easy enough but 0/10 on th enerdy satisfaction scale...).
i use the app Network File Manager 10, works also on wifi network. you can work from phone, copy/past from desktop to phone and phone to desktop. i don't know it show up on the desktop, i work with a dataserver.
hope it's help you
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