Please add .amr support

[paschulke]

Hi,

I am receiving MMS from Vodafone containing sound (amr files).
Could you please add support to listen to these files. This would be great, as these messages are from the visual mailbox of Vodafone Germany.

I think many other Vodafone users would like to use this feature.

Thanks, and you are doing a great job!

Regards,
Steffen