Comment 1 for bug 509911

@sahadat

I'm not sure why you think this is a network-manager bug when it has nothing to do with networking.

You're missing the AMR codec which is used for sound in your 3gp files. I'm marking this a duplicate.

Also, in the future, please make sure to include the release of Ubuntu that you're reporting a problem against. Please refer to the following page the next time you enter a bug:

https://help.ubuntu.com/community/ReportingBugs