Hello. I recently bought a oneplus 2 and could not get OTG to work. It seems that the Oneplus 2 has some wierd USB 2 electrical connection within a Type C connector, rather than USB 3 in a type C. I have bought over a dozen different Type C - to - microUSB adapters and none of them worked as there is some pull-up resistor or something. Anyhoo, I finally got a type C to microUSB which WORKS on my Oneplus 2. I have used it for USB borescope/endoscope camera , USB Memory Stick and most importantly a USB WIFI dongle !!!! *** !!!
And it was less than 2 quid.
http://www.gearbest.com/cables-conne...48.html?wid=21