I think the device I have the best chance of working with this is my Samsung Galaxy Tab Pro 12.2'' When I plug a flash drive into the OTG cable it brings the drive and it's contents right up.

My Droid Razr is on Tekins list as a known working device. When I plug the hot wire into that I have to plug the LiPo into the ESC and switch it on for the interface to get power. When I do this, I don't get the fast flashing green LED, I just get a solid green LED and it does nothing on the Razr. I'm thinking I might have gotten a bad v2 interface...

I have 2 RX8's I've tried this on with the 250 firmware and the newer beta firmware.