Default [Q] Mic distorted (& echo) in voice call, fine while recording

Hi,

I have an issue with my mic on my galaxy S2, whenever I call or get called, my voice sounds incredibly distorted.
It's not that it's too soft, it's actually quite loud, just very distorted.
My voice is also echoed while calling.

However, when I'm recording, the mic gives me a great, clear sound.

I've read up about it, but most people are complaining that the volume is too low, which absolutely isn't the issue with me.

Anyone have some solutions?

They're much appreciated!

Greets, Sean
Samsung Galaxy Tab 8.9>Samsung Nexus 10: [MANTA]P.A.C True All in 1 ROM [JB 4.3]
HTC Wildfire S> HTC Desire> Samsung Galaxy S2> LG Nexus 4: [MAKO] P.A.C True All in 1 ROM [JB 4.3]

Nexus all the way... P.A.C. all the way... ANDROID ALL THE WAY!