I have used Tata Docomo Networks prepaid sim which have good offers, ratecutters, data packs and SMS message offers.
- But the defect with this network is its slow
And at some places in city network is not reachable
- internet speed is slow, downloading is slow
2g is deadly slow. 3g and 4g are somewhat better in my area.
-it takes long time to connect costumer care but they solve almost all problems
-charges are low and reasonable.