FYI my phone is samsung s23 ultra and wifi calling enabled and my ISP supported with this also only not working with tp link but the wifi calling worked with the main modem wireless and thats weird. and my router firmware updated to the latest up to date.

the Vowifi there and i can receive calls only but i cant make calls and again (that is only with tplink router) when connected to main modem even i tried another wireless from friends and and family and public wireless all work fine except my router 

before posting this thread i went through all the topics here and non of them worked:

Tried :-

- DHCP Reservation for my android phone

- Port Forwarding (Port 50, 500, 4500, 143, 993)

- Port Triggering (Port 50, 500, 4500, 143, 993)

- Toggling uPNP

- Toggling SIP ALG

- Toggling IPSec Passthrough

- Changing WAN DNS

- Toggling TWT + Toggling Airtime Fairness

- Changing DTIM Interval from 1 to 4

- Factory reset

- Port Forwarding + Port Triggering

- Port Forwarding + Port Triggering + Toggling SIP ALG

- Port Forwarding + Port Triggering + Toggling SIP ALG + Disable IGMP Proxying

- Listing my android phone as a DMZ device

- Changing wireless bands.

- Changing wireless chanells.

- Changing wireless Changed the security settings from WPA2/3 to WPA2-P/AES and all options.

- Changed the DNS setting.

- Reset the router to factory.

- every steps above iv restarted the phone and router.

i hope this issue can be fixed and such a shame a big router like this giving me a headache from the of setting it up.