I have 2 SIM cards. I did *#*#869434#*#* and disabled carrier check. In settings I enabled "Make calls using Wi-Fi" and with Wi-Fi preferred.|
On one SIM card vowifi works and on the other one which is on roaming does not although it is enabled by the carrier. I have a Mi 9 SE on MIUI Global 12.5.1 and Android 11.
When I dial *#*#4636#*#* I see for the SIM card which is not working that Wifi Calling Provisioned is ON but greyed out. IMS Service Status is "Not Registered" and VoWifi unavailable. APN type is "default,supl,ims".
I tried opening modem test tools by using *#*#663368378#*#* code in dialer but nothing happens.
Why does not the modem test tool pop up?
To fix the problem I am trying method 2 from this article:
https://www.miscw.com/how-to-ena ... 0-solved-41243.html
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