Originally Posted by mitsosJL
So I have to find a kernel which enables it uhh?
Have the processor do not mean you have that option on your phone, like DT2WU. Also can be vary different from 4.3 to 4.4,because on 4.4 it can be managed differently. BTW, on my 4.3 I have some kind of Voice Search in Settings > Language & input > Voice Search. I don't know if you looking for that as Voice Activation seems to be something else, like Activate the phone by Voice and for that you need a kernel, so on 4.3 that is the only option I got.