Vi Vowifi working on vpn.

Got support for vowifi on my Realme 5pro, recently.
Connection is good, never drops, call quality is good too.
Suprisingly was on Windscribe VPN(to austria), and vowifi was still working, the call logs said it was a wifi call.
Compared to jio vowifi where I had call drops and receiver unable to hear me, seems vi did a much better implementation of vowifi.

i do believe vowifi uses wifi at system level and bypasses any VPN running on the device. i could be wrong though.

Vowifi for me on jio didn't work, if I had VPN on or changed the dns to whatever I want.

You need to have wifi on router level to bypass internal system.

Router level as in...?

Use a router like Asus RT-AC86U which has built in hardware accelerated VPN. You need to use own VPN credentials in it.

@tatasky VLR of a foreign/non domestic tower will prevent any Vowifi calls from being classed as a domestic/national call. They will be classed as roaming and billed accordingly. Vowifi doesn’t depend on the IP alone but also the MNC code registered on the handset by whichever tower it latches onto.

All those instances where Vowifi works without even latching onto a tower on Airplane Mode are faulty implementations of the system.

Yeah initial faults/bugs will be fixed soon then.

pillaicha said:

All those instances where Vowifi works without even latching onto a tower on Airplane Mode are faulty implementations of the system.

Click to expand...

I believe vowifi is supposed to work even in Airplane mode. iOS and some carriers let you do this, Prominent examples are xfinity(https://www.xfinity.com/mobile/support/article/wifi-calling-on-iphone) and ATT(Wi-Fi Calling from AT&T)

It is only Indian Telecom companies that have made it a slightly pointless feature. :/

wasn't it working for some users on OnePlus devices?

Wifi calling does need the cell towers initially to determine what's your roaming status, before you can use it. I have tried with different carriers (Indian and foreign) to keep the iPhone in airplane mode, and try to connect only to wifi in order to make a call. I've not been successful. I'm on the latest iOS. Region is a country that supports unrestricted wifi calling. It needs an initial connection to the tower, and then once wifi calling shows up in the status bar, I can turn on airplane mode and switch on wifi only. It'll work.

@pillaicha it works for me in airplane mode on iPhone with jio and also with cloudflare warp which is a VPN.

@Gaurav_add Like I said before, it will once the location has been determined to be within India. If the phone doesn't have a location fix, it doesn't activate Vowifi.

Location in Smartphones is quite complex. Operators use a variety of ways including but not limited to, MNC codes/eNB serial numbers of the surrounding towers, GPS coordinates from handset, surrounding WiFi hotspots SSID's and their known locations from archived databases, etc. This is all in addition to the IP address of the access network, which can't be spoofed with an on-device VPN but maybe a network-wide VPN (such as one installed on a router) could mask it.

My point is once the location has been determined by the operator, it's safe to turn on Airplane mode and connect only wifi. Things will work for a while till the operator needs your updated location again. Which all sources (and priorities) your device and operator use to determine your location, the algorithm behind it, and how long that location fix is valid for before needing revertification is all operator dependent.

So all in all WiFi calling isn't for people who don't have any coverage or nearby cell towers 🤔

A femtocell hooked up to your broadband connection is a better idea.