Re: Calculator
Go here - Settings/Device/Accessibility/Services. Make sure everything under Services is turned off, then try your calculator again. It seems that there is a little "bug" in that section that will turn on the "talking" calculator if something is on. I really don't remember what I did to start mine but I think it was when I tried out S Voice. I have since shut down S Voice but it didn't help the talking calculator until I shut down everything under "Service". Give it a try. If you want some of those things on you could download a different calculator from the Play store, that is what I did.