When I run adb devices
there are no devices showing as connected. My device is a LG Optimus Exceed 2 running 4.4.2
There are many of these posts around, so here's what I've done:
Any wizards out there who've already struggled with this who have advice?
I tried all of the connection types (charge, MTP, PTP) but perhaps not "Internet Connnection, modem"? You can change it by pulling down the system-wide drop down menu and touching "USB connection".
This is how I fixed it, but I thought I'd tried this already, so I can't guarantee it wasn't this in conjunction with one of the things done above.