621be4f0_ith_installing_____Skype_Blogs__Current_solution
[Devices affected] All [Category] Calling [Description] During an ongoing call, it is not possible to change in call volume while proximity sensor is activated. [Current solution] 
Move phone away from head to deactivate proximity sensor, then change the call volume.
Skype 2.0 for Android hotfix: resolved issues with installing – - Skype Blogs
Current solution