I am trying to upgrade M325 using below guide but links provided in this guide are not working.

https://blog.thetelecomspot.com/2019/07/18/how-to-upgrade-firmware-on-snom-m325-from-older-version-3-23/

If any one has upgraded M325 from 3.23 to version 4.10, please share setups you followed and if possible share firmware files