I bought a samsung galaxy s3 6 months back and had the same problem 4 months ago but it stopped on its own. The problem is while using my phone driving mode enables automatically spamming my S voice this happens at great speed repeatedly and stops on it own and starts all over again randomly. Cant use any application because of this and it gets really annoying. I scanned my phone for virus via avast and no problems surfaced. I removed my battery and sim card and inserted them again. Please help! It is starting to get on my nerves. Thank you.