I was having the same problem with voice commands on my galaxy s4 camera. I opened Google then went to settings clicked on voice then on "ok Google detection" i unchecked the last 2 boxes after that i was able to take pictures using the word "capture"
Side note: i am using TouchWiz standard on...
I had the same problem I had my polaris office 5 and HP service plug in turned off. Once I turned it back on I was able to open pdf files on my galaxy s4
(side note.... I am running KitKat on my phone)
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