On Android phones
JioCall can be configured only on one device with a Jio SIM at a time.To use JioCall app on a different device with the same JioFi SIM, you need to configure the app in that phone using JioFi. The app will no longer be functional on your earlier phone/device.
On IOS phones
JioCall app cannot be configured with Jio SIM in JioFi
. Hence JioCall app WILL NOT work behind JioFi on iOS phones.