Firmware Upgrade - 20x


I currently have an ESI eSIP 20x, which is a white-labeled Yeastar s20. Does anybody know if yeastar firmware for the s20 would work for the ESI 20x? My firmware is outdated (from 2018), and I am forced to pay for a dealer to do a firmware upgrade. If anybody has any information regarding this it would be much appreciated!


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