Bought a cheap endo...... Oh you know the story, looked a good deal and looked perfect for what I needed, plugged it into the Oppo 16a I have fully updated, scanned in the app suggested and it loaded and opened, You guessed it. Connect the device. No device was found. Checked Youtube for a fix. it suggests a USB C female to USB A male plus a USB OTG adapter back down to a USB C male so it will fit the only connection on the phone. This time it opened the app automatically but still failed to find the device or power it up. Doing a web search on the issue it seems that for some reason this is not an unusual problem for people to find themselves with and yet they sell hundreds of the things meaning that at least a large percentage have no problems at all. Tried several different control software apps with no resolution but the Oppo brand seems to keep coming up in dispatches as a problem child in this respect. Has anyone found a fix for this?? Oh as an aside the device does work on laptops and some tablets but not all which suggests a firmware issue.