On the dialer interface, enter: ##869434##
After entering, tap send. You should then see the message “VoWiFi carrier check was disabled”.
Go to Settings → Mobile network → tap your SIM card.
Now you should be able to find the corresponding setting.
Looks like it was posted a bit late, huh?
Thank you for sharing
I just found out about the GG card thing 
, even though I usually use physical cards.
Redmi Note 13 Pro can also be used
xxfx Thanks for sharing. Not sure if it works on Redmi.
We’ve tested it and found that the Redmi Note 11 Pro 5G can also be enabled using this method.
Even if you turn this on, it might not work. Sigh, Android is just too much trouble.
Android isn’t working well for me, I’m using a Pixel and can’t connect to CMlink WiFi Calling.
Can I use other brands of phones?
Can’t pull it up.
Xiaomi/Redmi MIUI/HyperOS Dialer Secret Code Reference
Capture logs *#*#284#*#*
Battery information *#*#6485#*#*
Engineering mode/CIT test *#*#6484#*#*
Device information *#*#4636#*#*
IMEI information *#06#
Show 5G toggle in Settings *#*#726633#*#*
Show 5G toggle *#*#34834#*#*
5G signal information *#*#544636#*#*
VoLTE toggle *#*#86583#*#*
VoWiFi toggle *#*#869434#*#*
VoNR HD calling toggle *#*#8667#*#*
5G N28 band toggle *#*#794824#*#*
5G N1 band toggle *#*#616633#*#*
5G N3 band toggle *#*#636633#*#*
5G N5 and N8 band toggle *#*#65686633#*#*
5G N28 band toggle *#*#6286633#*#*
Show/hide primary SIM SA mode toggle *#*#726633#*#*
Show/hide secondary SIM SA mode toggle *#*#842372#*#*
Show/hide 5G power-saving toggle *#*#547693784#*#*
Enable/disable coexistence of WeChat and calls *#*#932428#*#*
MIUI stability settings *#*#11811#*#*
Email DEBUG mode settings *#*#0616#*#*
Device information *#*#0000#*#*
UI information tool settings *#*#1130#*#*
UI information tool *#*#847#*#*
Submit feedback *#*#123#*#*
