Problem with C902-micro (too quite)

Hello,

standard calls with my C902 are working well.
But when I switch to speaker-mode the other can't understand anything because I'm too quite --> my C902 doesn't amplify my voice.

what can I do? are there some options to configure the amplification or maybe a defect of the micro?


regards
MS

try to updte it with seus

thanks - but let's say....
my C902 and SEUS aren't best friends :(

see post:
C902 update-problems with SEUS - hangs at 98% - Top Sony Forums

expensive mobile but still a lot of problems (at least my sample!)