Sep 04 2021 06:12 PM
Sep 04 2021 09:52 PM
Oct 07 2021 02:02 PM
Jan 09 2022 08:11 PM
Jan 26 2022 04:37 PM
Oct 27 2022 08:31 AM
Same issue here. The phone will be fine and then all of a sudden it starts flickering making the phone UN-usable.
Jul 31 2023 04:49 AM
I had the same problem with C450HD and C448HD. I was able to solve the problem as follows.
Making the switch back to Skype for Business "blindly" via SSH ScreenShots. In Skype for Business via WebGUI back to an old firmware (UCC450HD_3.4.4.1000.10). Most of the time the screen started working again. It sometimes took up to 30 minutes until the screen was legible again.
Then I installed the latest firmware for SfB (UCC450HD_3.4.6.537.20) I had the problem that the "Switch to Teams" option was missing. However, since the bootloader has been updated, you can switch to teams with "Back and OK" when starting the device without the display becoming illegible again.
With all C448HD the display was upside down. This was then fixed with an Android update.