Airtel is the worst mobile operator till now that I have experienced. The data pack is worst than ever. The only thing that suits on this mobile operator is talktime. It gives plans of rs.399 like jio, but the network quality is worst. It suddenly changes its connection from 4G to H+ , which merely means that it has lost its connection. It frequently does so. This causes huge chaos when you need urgent internet access, you are at work, business, lost your road or playing a game. It causes huge bias and you often end up begging for wifi. It gives 1gb per day in the 399 plan and after you have finished it, they just disconnect your internet access. You cannot even surf the net unlike jio sim users as Airtel does not reduce the speed to 128 kbps. It just disconnects your network. It is not unlimited. So, I would recommend you not to buy horrible airtel sims. Instead, go for Jio.