Ive ordered my HU and will install once it gets here. What USB did you use and how has it worked so far?
Bought the outlet from Amazon for $14:
https://www.amazon.com/Socket-Port-...s=gateway&sr=8-1-fkmrnull&tag=viglink20350-20
The audio outlet has a USB plug on the back, which connects to back of HU with a USB extension cable. The charge outlet has two wires on back, which I tapped into the nearby cigarette lighter.
The only complaint on the outlet is that cables plugged in aren't very snug. I sometimes lose connection if I bump into it. Otherwise, it's been great with Android Auto (don't have iPhone).
Use good quality USB cables, rated for USB 2.0 or 3.0. Initially I used a cheap Dollar store cable and the HU wouldn't recognize my phone (said either invalid USB drive, or no device connected). Problem solved when I switched to a good cable.