Tata Teleservices (TTSL) said on Monday that it is terminating its membership with COAI, a powerful lobby of GSM players in India.

It called COAI a sham and said that the functioning of the body was totally undemocratic, biased, non-transparent and unethical.' Tata was amongst the core team of COAI.

In a letter sent to the Director General of COAI, Rajan Mathews, TTSL said that since it found that the functioning of COAI was not transparent and since it was just a representative body of only a few members, TTSL has decided that it will move out of it.

The letter further added that COAI was working as an obstacle rather than any kind of help.

No comments were given by Mathews.

Tata has also alleged that COAI has been focusing only on what is called 'myopic growth' and that too only of a very small number of players. There was not proper representation of the smaller players.

Bharti Airtel, Vodafone and Idea Cellular are part of the core team and Sanjay Kapoor, CEO of Bharti Airtel was elected as the Chairman of COAI last week.