The tata docomo is very poor in range. Because range of tata docomo is poor. Somtime range will be lost.and no coverage area.and somtime other person call me.than cimputer says phone is swith off or not in the coverage area.this is biggest problem in tata docomo service.this is bad for tata company.and costumer is suffer from this problem. If tata docomo solve this all problem than it is better for company and also for costumer.