When I plug the USB cable, the debug icon doesn't show up. adb devices doesn't see it.
- Developer mode enabled.
- Developer option enabled.
- Stay awake enabled.
- USB debugging enabled.
I am already in developer mode. Yesterday it showed up after insert sim card and reboot but this morning nothing.
I am using Debian 8 and debugging other devices has never been a problem.
I even tried rebooting the PC, and "hard" reboot the smartphone (letting the battery discharge completely) and start it again, but without success.