Hi I am hari..I used all cellular products both in gsm and cdma..so ican write the review.
In chennai tata gives a good signal.Compared to his mobile service , the walky service ie the landline service goes top.But tata is not having a domestic plan for the normail low usage customers.
Signal wise its good..But comparing to reliance its not..
Their billing is error free..But since it is system billing, errors are occured in chances..But u can get the itemised bill and clear your clarifications.
But tata should bring handsets exchange facility also bcoz once if u use a model u have to stick with that..Even if u want to change its not possible..I Mean the old handset cannot be reselled..This is one draw back I found in the cdma providers.
The handsets are also getting heat up as soos as u r in call for five minutes..This is horrible, , , Every time u cannot go for headsets..
They should release some trust worthy hand sets for the future development in the product..
They should also bring state wise tariff not a common tariff for the whole country..They should re define the tariff according to the state and the competators