Nothing works on 4.2.x and 4.3.x ROMs, I haven't found a solution yet. Works only on 4.4.x ROMs, it's a new feature.
- HTC Desire 601 LTE, KK Android 4.4.2 (main phone)
- Acer Iconia Tab A200, ICS Android 4.0.3 (games tablet)
- Samsung i896 Captivate, JB Android 4.2.2 (backup phone)