Anyone having issue with Maxis VoWifi after updating to iOS 16?

I notice mine won't connect to VoWifi anymore when I turn on Wifi after updating.

I’m using maxis, ios16.0.1, no problem with vowifi

Sometimes will show VoWifi, sometimes not

Same applies before I update to iOS 16

2G and 3G network are analog.
4G-LTE are fully digital packet network.

In order for voice call to be handled by digital network, the sound (naturally its analog) have to be converted into digital equivalent to be carried over LTE network. Thus, Voice-over-LTE. If either or both your phone and telco does not support VoLTE, then your phone is required to step down back to using either 2G or 3G everytime your phone need to handle voice calls.

Voice-over-Wifi is the equivalent. But using the wifi you are connected to instead of using telco tower.
it's a good alternative for those with patchy tower signal.

your telco phone number and charges is still the same.

phone call charges still applies

it's just like driving car. there can be multiple routes you can drive to the destination intended but you're still paying roadtax.

incorrect. as already stated, you are still liable to charges incurred by the phone call.

So look at your rateplan: if they charge you for making a call, then the same will still apply. Whether it through  2G, 3G, VoLTE, or VoWifi is irrelevant as far as metering and charging goes.

look, ignore whether you are using 2G, 3G, VoLTE, or VoWifi.
look at your rateplan; what types of calls are charged and what types are not.
if your rateplan says a call chargeable, then it is chargeable, regardless whether you are using tower or wifi. if your rateplan says it's already covered for, then it is already covered for, regardless you are using tower or wifi.

lets use example from Digi.
also note that Digi put additional condition: if you are NOT using cellular network i.e. use VoWifi, it will NOT use CELLULAR minutes bundled in roaming plan i.e. you will be charged PAYU rate.

https://help.digi.com.my/en/support/solutio...ll-with-vowifi-