Hi. I have had the Strat for a week and overall really like it. However, I have noticed on a few phone calls, that I have difficulty making out what the person is saying. The sound is loud enough, but it's almost like the sound ebbs and flows. I find myself having to concentrate on what they are saying and try to piece the conversation together. Not every call is like this. But enough that it is frustrating. Ideas? Fixes? return? thanks so much for your help!