If you Google it you will see some posts about usign a resistor in the data lines and that works for doing both at the same time

Umm, did you actually read my posting?

The thing is supposed to do that out of the box. Read "Micro USB for Data and Charging."

If you go to the link I provided you can read that is "will" do both at the same time. It is NOT a conventional OTG cable and that's why I bought it. BUT, the problem is, it is only working like a conventional OTG cable.

Your link isn't working for me, but assuming that the dongle is the one linked to below (Dell part 470-ABES), it should work without issue and is a great accessory, just plug and use--get power and USB simultaneously.  I wonder if yours is defective--I'd contact Dell for a replacement.

There's also a similar power + data charger available through aliexpress.com (and sometimes eBay.com), which further adds a 4-port USB hub to the device, all in a sleek package, for around $15-$17.50.  A great device, and recommended.

http://www.aliexpress.com/item/Universal-usb-OTG-Charger-HUB-cable-for-Tablet-PC-thinkpad-8-X98-M80ta-WT-8-Miix2/2038609573.html

What model do you have because it is not compatible with the V8Pro 3000 series. I was about to buy this too but I have the 3845 series.