We recently upgraded 78xx phones to latest firmware and did not face any issue so far. We performed several tests and looks okay. Phones are not getting disconnect, users did not report issue.
Have you upgraded 88xx models to latest firmware? Did you face problem?
If I do not hear feedback, I will upgrade my phones and share my feedback here for community.
We recently upgraded approximately 1000 Cisco 8800 Series Phones to 12.7.1 due to recent CVE announcement. It's almost week for the upgrade and we haven't heard any complaints except the software bug CSCvt04894 which is little annoying for the end users.
Yes I am aware of that bug, thanks for reminding.
Did you apply device pack before phone firmware upgrade? If yes, which one?
I have performed firmware upgrade procedure on CUCM 12.5 which doesn't require device pack. I have installed "cmterm-88xx-sip.12-7-1-0001-393.k3.cop.sgn" on CUCM 12.5 and followed the procedure mentioned in readme file.
I upgraded the 88xx, any phone that has enhanced line mode has an issue with the caller ID when reeving a call. The called party is also displayed as the calling party.