Digi, umobile & celcom comfirmed.

Do u receive any sms from celcom which informed that your vowifi is activated? If yes, then check your connection setting whether vowifi is enable or not. If your phone dont have the setting the type *#*#869434#*#* on your phone dialer.

P/S: Please make sure your phone software is up to date.

Yes, it need your telco to enable it.

no idea how much to fix it.

do you use the power button a lot?

the only time i need to press the power button is to restart/turn off the phone, which i hardly ever do..

Did u have volte enabled? If u have volte then u can just force vowifi by dialing *#*#869434#*#*

Basically it'll force vowifi swith to appear in Xiaomi phone setting regardless of telco support. Obviously also need telco support at their end too for it to actually work. After dialing the code then the vowifi toggle will appear in phone settings, enable it and see if vowifi icon appear in status bar. Then check by dialing out and receiving call. Test for a few days, see if your contacts complain can't reach u or not. If they complain then can redial the code again to reenable default behavior.

I did the same and it works fine. Contacted maxis cs to enable volte and vowifi but only volte enabled, vowifi switch doesn't appear on phone settings. Did the code, vowifi toggle appeared, i turned it on and tested for a week or 2. Now I've reset it to default behavior again and the vowifi toggle stays and vowifi still works.

nope. volte will disappear when vowifi is available.

Daheck... so it's because of MiUi version? Damn I thought it's Maxis side. I'm guessing you're not on Global MiUi 14?