- Joined
- Apr 14, 2017
- Messages
- 30
- Reaction score
- 1
I have been having an issue with upgrading the firmware on multiple Yealink phones at the same time when upgrading from 15.5 U3 to U6 and then again when upgrading from 15.5 U4 to U6. I used to select 5-7 phones at a time and now cannot select more that 1-2 without getting an error message:

I wait a few seconds, select another phone and no error message. Has anyone else encountered this issue?

I wait a few seconds, select another phone and no error message. Has anyone else encountered this issue?