I used idea 4g lte network for almost 2 months and I find much inconsistency during using network it gives you nice high speed around 3 to 4 mbps when you using playstore app like youtube, facebook etc.
But your speed will decrease upto 20kbps or even less when you use internet via browser you cannot download anything except some 4 to 5 kb size images.
It’s a very common problem in idea and airtel network that you would not any netwok signal or very weak signal inside your room not clear voice during talking.