I will give airtel to 100 out of 100 marks due to its connectivity, performance in remote location, speed & low cost.
Airtel have high speed in compression to all the company on this category.
Connection are good spacial while using in remote location, it give full of network on it.
I have aritel connection from long time, airtel give me good services & support & resolve the problem with in 3-4 working days.