Sorry if this has been ask before.
I have got the samsung galaxy s3 had to take it back once and now on my second one, but I am having the same problem as the first.
Every now and then when I receive a call or text message it will just vibrate or no sound. I checked my settings and they are all correct for sound. Am I the only one having this problem or is it a known problem. How can I fix it. I have missed a number of calls and text because of this.