BlackBerry 7100 / 7105

I've had this 7100t for about 1 month now and love all it's features. I haven't had any "bug" issues (yet!).

However, everyone I talk to comments on how hard it is to understand me. Yes I speak English (loud and clear).

I've been told that I sound like I'm underwater, got a hand over my mouth, or am talking too far away from the mic. By the way, where in the heck is the mic anyway?

I've tried the phone, hand's free, OEM headset, and a Motorola Bluetooth; all with similar comments.

My phone has been updated with the latest T-Mobile provided software and I don't think there is anything left that I can do.

If those I call have difficulty hearing/understanding me, I may have to switch back to my SideKick2 or other PhoneScoop user-suggested phone.

Thoughts? Similar problems? Resolutions?

Thanks,
EZOffices (Los Angeles, CA & T-Mobile)