Samsung S6 7.0 upgrade issues

[wayland63]

I upgraded to 7.0 a week ago. My phone is locking up periodically, but even more frustrating is that my google cal no longer syncs. Checked settings, uninstalled and reinstalled, etc.
I have screen shots of my phone particulars if needed.
Anybody had these issues? Solutions?

 

[Victor Khizhnyak]

Just want to clarify is this the S6 or S6 Plus? Also are you having any call quality issues as well or just phone locking up? Screenshots would be helpful!