naren_s Not sure if this is really a Nothing issue. Sim stopped working all of a sudden, tried in a Samsung phone. Same issue. Didn’t want to do R&D, went straight to Airtel store after reading your comment. Saw many people there facing same issue.
The catch here is that they demand an online payment of INR 50. Now since the sim isn’t working, even if you connect to hotspot, UPI apps won’t process the request due to lack of sim. So either you go with someone who will pay on your behalf, or you click a picture of the QR code and send it to someone who will pay on your behalf.