Android 6 and Sony Z1 Compact

[Geliosoft]

I can update my Z1 Compact to Android 5 but I read that Android 6 has many bugs fixed. Do anybody have experience with Android M on Sony Z1 Cpmpact?

 

[Geliosoft]

When making calls, the other party can't sometimes hear me. Does update to Android 6 help?

 

[Geliosoft]

Is there official Android 6 update for Z1 Compact?

 

[Geliosoft]

My phone allow me to update Android L only.

 

[Geliosoft]

I click to update and it says there isn't any updates toAndroid 6.