[Problem] Changing Sip port from 5060 to 2060 in FritzBox 7050

[funxlab]

Hi Everybody,
I hope everyone is doing well. Sorry for another post in English, my German skills are below zero, Entschuldigen Sie for this

My ISP blocks default port 5060 so I want to change SIP port to 2060 so I can use sipsorcery on FritzBox 7050 as sipsorcery allows port 2060. I used Siemens SX541 which allows changing SIP port and successfully connected on port 2060 to sipsorcery.

Someone on Internet mentioned he changed SIP port on Fritzbox 7050 but didn't mention how.

Please help.
Thank you...
Jim.