can't receive calls after installing toolbox

[Former user]

I don't know if this is Toolbox's problem but when I install Toolbox and receive a call neither can I hear what the caller say nor hear what I speak???? Not sure if it's broken the other way around :( I uninstall Toolbox just now and everything's ok. Pls help?

[Mikanoshi]

It's not Toolbox, it's some problem with Google Services and you will have this bug again. Some say downgrading Google Play Services helps, rebooting device also fixes it temporarily.