Join Date:Joined: Aug 2011
Same here. Tried on a call with W810i. The volume level is very low for the receiving side. And nearly all people I've called since buying this phone implied my voice was low.
Notified Huawei. After trying root and setting hw_secondary_mic to 1 (in system/build.prop) (can't link yet) I may think about going for warranty or simply returning back (it has been a few days.)