Andreeas1978
Previously known as "AndreiNicolae"
If it's not a cable problem, I also have a few that don't work or work only directional, maybe the phone doesn't have the proper drivers. When installing for instance UAP or another App known to work with USB dacs I think it installs its own driver and should work. If still nothing happens it might be the Android version that doesn't recognise USB DACs..