I am using tata docomo for last 4 year. The biggest problem is poor indoor/outdoor network coverage and the internet service is very bad. Tata docomo roaming pack are not working properly in some areas. I am disappointment with the customer service. Its is very bad customer service. Tata docomo charges is very costly to other. I am not satisfy to this poor network. Tata docomo recharges is very costly to other. Tata docomo service centre is bad behavior. Sometime customer care is not receive my call. I believe you will understand the importance of matter.