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- Apr 29, 2023
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Hello, I recently upgraded 3CX from v18 to v20, ever since I upgraded, I get an unsupported firmware warning on some of my phones. I have a Fanvil X7-V2 ip phone. On the 3CX, it tells me to upgrade the firmware from 2.12.16.20 to 2.12.17 but it doesn't upgrade even though the phone reboots. I tried upgraded my phones manually from the Fanvil website but I still have the same issue. I would like to know if anybody have this issue and what are the solutions?