When I go to https://sandbox.us.webexconnect.io/ and try to Sign Up for a new account, I am told "Email id already exist." When I try to sign in with my saved credentials, I am told "Invalid email ID or password." When I select Forgot my password, I ...

I will be upgrading phone firmware on a number of phones as part of a CM upgrade.  Do all phones retain their missed/placed/received call history through this process or do they have this erased?  Are there certain conditions where the call history i...