[Resolved]  Tata DoCoMo / Prepaid Mobile Service — NOT GETTING CALLS FROM OTHER NETWORKS

I have a problem with my new Tata Docomo Prepaid mobile services. My friends & family members have reported me several times that they have tried to call my number but it says network busy or not reachable. The same problem occurs for another Tata Docomo number as well.
Sometimes even while calling from Tata Docomo to Tata Docomo sucks! Get Network error even though it shows full signal strength.
Please try to figure out these kind of issues sooner else we will have to throw ur sim cards in garbage and walk away.