My phone (2nd phone, 2nd SIM) just had the mic problem resurface late last week. I kept the phone despite the 15th coming and going, then had the problem again today while talking to my grandmother. Totally frustrated, I headed back to Verizon. For now, they are telling me something I saw posted on one of the forum threads: I am supposed to dial ### (send) immediately after I drop a call for the next 5 times it happens, and then call tech support back. Apparently I was added to an open ticket for this issue that they are still trying to resolve per feedback from all users experiencing the issue. I don't know if you can just jump on the bandwagon and press ### when it happens to you or if you need to call tech support first and get on the "official list". I made sure they noted on my account that despite loving the phone in every other way, I simply can't have a phone that doesn't handle calls. If the problem persists, I'm going to have to deal with the GB Sense UI on the Rezound. Not my preference although playing with it today in the store, it's not a horrible phone aside from the UI and lack of ICS.