TP-Link mesh system with T-mobile gateway

bipd818 wrote:

I have the new 5G T-Mobile Home Internet Gateway hooked to a TP-Link Deco M5 mesh system.  The mesh system has been working fine with an xFinity modem for years.  The T-Mobile Gateway/Deco M5 system appears to work fine for all things Wi-Fi EXCEPT I can't make or receive Wi-Fi calls on my T-Mobile handsets (iPhones).  The Deco M5 system (and another Deco M9 system in another home) have always worked fine for Wi-Fi calling.

I’ve been working with tech support off and on for a month and they haven’t been able to identify the problem or come up with a fix.

Any suggestions? 

Just based on the timing of your post I’m guessing you have the Sagemcom gateway and if you check out this cadena you'll see that you shouldn't have this issue much longer once the new firmware is pushed to your gateway. Unfortunately there were issues with this firmware version bricking a ton of devices so I'm not sure when TMo will begin pushing it out again (or if they will just release a newer version once they figure out why it bricked devices) I can say that I still have not received a firmware update on my gateway at this point and still cannot use wifi calling...