It used to, back in 2016. I had connected my sim to a usb dongle, plugged into a charger, and I fired up the Jio4Gvoice app on my dad's phone, and it activated calls. I made a call to my Idea sim, and it went through. A couple of months later, Jio disabled it. I didn't really need it anyway.Jio4GVoice app does not works on WiFi, only on mobile internet connection. I believe it has something to do with current regulations in place.