According to wiki,
https://en.m.wikipedia.org/wiki/Lis...perators_of_the_Asia_Pacific_region#Singapore
Simba don't support vowifi. I made enquiry before via Instagram chat. They also say no support.
Can explain simba's reply to my vowifi enquiry. Tell me can or cannot support with Simba. Lol
"VOWIFI can work if you are connected with Wifi connection. Since the service of Simba is using 4G connection, this is not applicable with Simba service, unless you can connect your handset to a WIFI connection. However, it will not be a service of Simba."
If vowifi is active, you will see the volte logo changed to vowifi. My brother on giga network has that.
actually my mistake
still did not work
so ultimately emailed simba and ask them to enable for this phone