Issues with Mi3

Sep 15, 2014
Hi guys,
I've been using Mi3 for more than a month now. During this time I have faced the following issues -
1. No voice over internet calling - When I use apps like Hangounts, Viber or Skype to call over internet, the other person is not able to hear me. I have checked the permissions and everything is allowed for these apps.
2. Screen hang while typing names in contacts - This issue is resolved in the new update.
3. App crash - Most of the apps just crash without any reason even if these are the only apps running.
4. Music player jumps from earphone to loudspeaker - Well this is a serious issue and has happened multiple times while I'm in office thus disturbing a lot of people.

Any help is appreciated.