Using "App Installer", I tried to uninstall my app (v0.4) for replacing a older version (v0.3), then Android says it's an "incompatible update".
When I turn to adb, it says "Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE]".
The worst thing is, now I want to go back to v0.4, but I still got these messages.
I can't find any way and there's Factory Reset. It works of course. SUCK.
I guessing it's because App Installer uses -k for uninstalling...