If by speaker for incoming calls you mean the earpiece, I've had both problems on my first device... I was working round the first by activating the handsfree loudspeaker mode, but when the USB port started becoming unreliable for charging back it went. Both problems ahve been discussed at length here. However, I suspect that this is an early batch issue rather than an overall build decline; many early E90s had faulty mics, but replacement models were pretty rock solid.