Are you going to be selling the 7 inch
I am going to keep it. I need to swap it back in when I take it in to the dealer.
I ordered the unit from Infotainment. It also happened to be a new unit too!
My theory --- I am not an electrical engineer but I surmise that they have "split the USB lanes" so to speak on the 8.4 radio. On the back of the 8.4 unit you'll notice 2 plug-ins that have USB connectors. With the Sport units we only have one plug-in. Now, the 8.4 head unit is only an option on the Sahara and up. I'm guessing since the Sahara and up come with USB ports in the back seat as well, they divided the power out put of this unit for the USB ports to enable it to deliver power to the rear ports as well giving the Sahara and up that 2nd USB port plug in for the back of the unit. So, yes, it will provide power to USB2 in sport units, but not enough power to handle CarPlay/Android Auto. Now if someone could come up with an adapter to combine the 2nd USB port plug-in on the back of the 8.4, unit, it would probably fix the problem.
Interesting thought, but I think it seems like something in the firmware - mine pulled Carplay up on first boot - I didn't realize it, but I had my phone plugged into USB2 when I turned the vehicle on after I installed the new stereo. After it did a vehicle discovery and rebooted, though, I haven't been able to use USB2 for anything other than charging since.
USB doesn't quite work that way. If anything, from a hardware perspective, you can run into power issues if you share too many USB ports without boosting the power. 500ma per port is spec. You will see higher power ports to support smart devices. Usually, the power adapter advertises this. 1A to 2.4A is fairly common. I would expect to see a second or third port cause power problems.
