Go to your one plus phone dialer and dial *#800# it automatically opens a new Log-test window and clicks on enter.
And if this is not available then follow these steps.
Go to settings > Wi-Fi & networks > SIM network Then find wifi calling toggle if it finds then enable it and enjoy wifi calling to make & receive calls.
Connect your OnePlus phone to any WiFi network.
Steps to Enable WiFi Calling in any OnePlus device You can do that by heading over to your T-Mobile’s network settings in the Samsung settings app. Calling preference to WiFi: Setting the Calling preference to Wi-Fi only also seems to have done the job for some.
WiFi with data connection because of this technology uploading and downloading voice on the server using data of wifi. Workarounds for the WiFi calling updated notification on Samsung.
Currently in India Airtel and Jio are official support wifi calling service and BSNL, Vodafone Idea rebranding to VI are not supported wifi calling.
Supported wifi calling service provider sim and this has an activated plan for incoming and outgoing calls.
In the latest Android 10 OS Update, you don’t see the option for vowifi in oneplus 5 ,5T so you can download an old oneplus logkit app from here OnePlus old Logkit install it and reboot the device.
All you need is an existing voice plan and an HD voice compatible device.
It’s included at no additional charge.
Helps connect in case of signal issues in remote areas or cellular-dark zones of a building.
Make and receive calls with Wi-Fi using the existing phone number.
Wi-Fi Calling is a High Definition (HD) voice service that uses a High-Speed Internet connection to let you make and receive calls over a Wi-Fi network. Wi-Fi Calling is a path-breaking technology that allows customers to make and receive calls over a Wi-Fi network using their existing phone number.