This is not supported yet, that could be the problem. 96.86.0.76 is the newest supported firmware.96.86.100.5
on the official web is 96.86.0.76
https://www.3cx.com/docs/phone-firmwares/
That surprised me, we surely installed the correct firmware... or is our not supported?
Can you please open a support ticket through our partner portal support section? We need to gain access to your 3cx machine in order to remove this unsupported firmware so you can then download the correct firmware to update the phones.but why its not red underlined in the phone tab?
any why I can show it with the Firmware button?
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.