Well I used this in bangalore for 5 months and it worked properly there. I got 4g speed. Then I moved to delhi and it was working properly for 6 months and then started giving problems.
It gave speed of 250 kbps -580 kbps. I raised multiple service requests calling customer care but nothing happened. Finally I had to stop the connection and then they started calling and sending me emails for bill payment for the time period I didn’t use it.So guys pls avoid airtel and go for other cheap options like mts.