The problem exists with other vendors also, and he is quick to point that out as well, in the beginning to the blog (if I can call the doc that). The problem lies a lot with the inefficiency of people working for such companies, but, on tracing back, it again goes back to the company and their ineffective policies, practices and methods. Taking an example, they give contract to a sub-dealer/contractor/associate who offers the best deal, in order to make more profit, who in turn compromises on quality to get his pound of flesh, which in other word means hiring of slip-shod salesmen/CC executives, who wants to meet his target with the limited capabilities and training etc given & so on the cycle continues.
This problem happens with every operator. This is common cheating practice adopted by each and every operator. If you ask for discontinue their service to CC on phone. The standard reply of this CC is "Sorry Sir, Our system is in maintenance. Try to call after 4 hrs." I have got this reply 9/10 times. No matter who the operator are.
I am using Vodafone Prepaid with 3G Services activated for more than 2-3 months, seems to be working just fine for me.In NCR region I get speeds of up to 5mbps and reception has been solid even in lifts and basements, but that is my personal experience.