Has anyone managed Wi-Fi calling with Xiaomi Mi A2 on EE network?

[Rokster]

(Before I start, I know that no Xiaomi is listed in How do I use WiFi calling?)

I have enabled Wi-Fi calling on the handset (instructions here) and yet it doesn't work with the EE network. I don't know if this is an issue with the handset, with EE or with the BT router.

EE tech support were unable to help. I contacted the complaints department as, now that the signal booster boxes have been disabled, my phone is basically useless from my home address due to the poor reception there and they advised me that the handset is not supported by their network and that there's nothing they can do. They also mentioned that they weren't trained in the tech side of things.

Does it make sense that the handset supports wi-fi calling but not via the EE network?

Has anyone successful used wi-fi calling using this handset (on the EE network)?

[Chris_B]

@Rokster  It makes perfect sense that the device might not work on EEs Wi-Fi calling service.  EE don’t have to test or check a device that they sell,  there are far too many devices that EE doesn’t offer and they can not test every available device on sale.  
 
can you check to see if a known supported device works via your router?  Can you place your sim in that device? 
you need to check that the router isn’t stopping the service from working.  You need to check that your sim/EE account is Wi-Fi calling enabled first before moving to the handset.  

[Rokster · Accepted solution]

Thanks for the reply.

Since the initial question I did some more Googling. My previous Xiaomi Mi A2 unlock code was *#*#869434#*#* which enables VoWiFi/WLAN. I found another code - *#*#86583#*#* - which enables VoLTE. Since entering the second code I have working WiFi calling!

I don't know whether both codes are required or just the second but, as it's working now, I'm going to leave it be 🙂