I am using a Proxmark3 Easy and have so far tried it with Linux, Windows, and Android.
As I bought from DT it came labelled as having Iceman RRG firmware v4.9237-1270-g65478867.
I got it working with the latest client on windows using Proxspace and following the instructions at
I then switched it to a Linux box, fetched the github branch (again) and it worked.
Finally I tried it with Android, I tried Walrus first (it didn’t work) but Walrus seems to need a mainline firmware.
I then switched to RFID-Tools from RRG. This asks what device you are using, I selected Proxmark3-RDV4 and it quite happily talked to the Proxmark3 Easy.
As for the android hardware, I am using a moto g7 running Android 10. This has a USB-C port on it, I used a Male USB-C to Female USB-A adapter and the cable that came with the Proxmark Easy.
I hope that this is of some help to others.