I'm not sure if you are using the older black hotwire or the newer white one? I use the older black one and I have to use a OTG (on the go) cable, or it won't work with my samsung tablet or phone. I'm not sure about the white hotwire whether this is required or not. I program my Gen 2 spec and Gen 2 RS without any issues with my samsung table and phone using my older black hotwire and the OTG cable. Good luck.