QUOTE(Chrono-Trigger @ Feb 21 2024, 12:39 PM)
It worked for me with Digi years ago while I was oversea.
Now I don't know after CelcomDigi merger.
Digi WiFi Calling definitely still works overseas. But I’m wondering if anybody on CelcomDigi Postpaid plan had tried if CelcomDigi allows WiFi Calling to be used overseas too.
QUOTE(Keatsan @ Feb 21 2024, 07:15 PM)
I've experienced an event whereby when my phone is connected to WiFi but the signal to nearest Telco was weak and showed No Service hence unable to make any phone call over WiFi.
VoWIFI still needs a signal connected to Telco Tower in order to make a phone call over WiFi.
Correct me if I'm wrong.
Works even in Flight Mode as another user mentioned.
QUOTE(LaiN87 @ Feb 21 2024, 08:31 PM)
Digi Prepaid Plan VoWiFi works overseas in Jan2024.
Yes. Digi WiFi Calling is working overseas but how about those on CelcomDigi Postpaid plan ? Anyone has any idea ?
Because Celcom WiFi Calling doesn’t work overseas right ? So I wonder if those on CelcomDigi Postpaid plan is able to connect to WiFi Calling whilst overseas…
QUOTE(Sam Leong @ Feb 21 2024, 08:44 PM)
no, VoWiFi works even when you are in flight mode or totally no signal
Basically it uses the same technology as VoLTE (Both based on IMS)
What VoWiFi do is actually register the SIM card to telco's server and establish a IPSEC/IKEv2 connection between telco's server and user devices and transmit voice data via this tunnel
Digi allows overseas ASN / IP to register IMS so it works at overseas too
True. It used to work on Qatar Airways flights before Covid. Multiple SMS blasted in after I was connected to the internet via the plane Wi-Fi and my iPhone at the time was on Flight Mode.
Qatar however blocks VOIP already. So Digi WiFi Calling no longer works on Qatar Airways flights anymore.
By the way, Digi WiFi Calling also doesn’t work on Singapore Airlines flights.