Default [Q] Vibration and Speaker Issue

Hi *,

I've two Problems with my Razr HD (XT925):

The vibration doesn't work correct, meaning it's fading in and out. Every time the phone is not vibrating and i shake it, it vibrates again for next couple of minutes until it fades out again. So i think it's a hardware problem. I've tested several roms and it's always the same effect, so i suppose that it's not a software bug.

The other problem i have is the speaker of the phone. Whenever i talk to somebody i have trouble in understanding the other person, because the speaker sounds kind of tinny, like the whole case of the phone is vibrating. Changing the volume of the speaker won't help.

Do you have any ideas how to fix these problems?