It depends on when it happens and what device you have. Noneless, I'll try to answer.
If you have a newer device (i.e., running Jelly Bean 4.1 or newer), It could be Google Now speech recognition. Disable it in Google Settings or Google Search.
If you have a Galaxy S3, S4 or Note, it could be S Voice. Disable it in the settings for that app.
If it happens intermittently and/or on incoming calls, it could be Talkback or S Voice's Driving Mode (if using a Samsung device). Talkback is an Accessibility service, so would have to be disabled in Settings first. Driving Mode can be disabled from the Quick Settings screen.
If this doesn't help, post back with further details. Note that ss a guest poster, you will be unable to reply. It will be necessary for you to either register as a member (preferable) or create a new guest post with the requested info (+ a link back to this thread).
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.