Mar 24, 2022 by Charles Beumier | 1258 views
VoWiFi (also named "Wi-Fi Calling") is Wi-Fi-based telephony provided by some network operators. This is useful when the 2G/3G/4G connection is poor. Compared to the wellknown Voice over IP (VoIP) without SIP account (e.g. free calls 'inside' Skype or WhatsApp), VoWiFi calls are usually billed as a regular call (check this with your operator). To keep it short, VoWiFi depends on your operator (and uses your SIM for authentication) while VoIP does not.
Several conditions should be met to use Wi-Fi calling:
If activated, VoWiFi will be used when the mobile connection is weak. But if the Wi-Fi connection is too weak, the phone switches to the mobile network. If 4G is available, the call will continue thanks to VoLTE (Voice over LTE (4G)). Such a transition is not possible with VoIP (Skype, WhatsApp). If Volte is not available, VoWiFi switches to 3G or 2G.
And call me at +32 123 456789.
NNNOOOOO, don't do this ! It's a wrong number anyway, but make the habit of thinking twice before calling a number you do not know. More and more malicious people try to get your money by letting you call back premium numbers.
By the way, check what a hacker can do with your IMSI: https://cylab.be/blog/202/mobile-phones-should-you-be-afraid-of-disclosing-your-imsi.