Review on 📞 Yealink YEA-W56H HD DECT Cordless VoIP Phone Expansion Handset by Christine Eads

I've had a lot of problems installing firmware on used devices I've bought. Long story short, I ended up downgrading the base that merged all the phones to flash the older firmware. Then I updated the database to the latest version. After all the phones were connected to the base, I set up an FTP server. Added settings for phones to include the old version. I lowered the base and upon reboot the phones picked up the old firmware. Then update the configuration to the new version while updating the database to the latest version. Once the base was loaded, all phones downloaded the new update and I turned off the FTP server. Life is good.