Guys many thanks for all your reviews!!! I am living in Kottur, kotturpuram and ACT said it was feasible in my area. But the problem is, I use around 125 GB to 150 GB per month and their plan doesn't seem to have one suitable for me. But I'd asked the ACT person to let me know if any new plans are introduced. I got a call recently that a new plan has been introduced in Chennai. It's 125 GB @ 25 Mbps for 2,000 per month. That works out to ~ 2,240 per month. Now I am with Airtel 175 GB @ 8 Mbps. I was about to switch to ACT. But after reading your complaints, I am really worried about the phantom data problem. If they start throttling me before 125 GB is reached, I will be really pissed off. Because I am settling for 125 GB, hoping that upload wouldn't count at all, so I could use around 150 GB of UL+DL. But I am not so sure now.
EDIT: 125 GB @ 25 Mbps for 2,000 per month. Post FUP, 1Mbps