When are we getting bixby voice for our galaxy j7 prime... and also for the other samsung phones supporting android nougat...

After the nougat update of galaxy j7 prime. My phone is getting hanged and some times even the applications are not showed in the applications drawer... moreover the newly installed applications are also not shown in the app drawer... i dont get it w...

Galaxy A series Android o update... how fast can we get the update for the phone

pls can u bring an update for j7 prime.... i want nougat on my phone