Even as SIM cards have become the focus of investigations to establish the identity of the Mumbai attackers, the Department of Telecom (DoT) has found that at least two lakh mobile phone users, almost 20% of the total vetted connections so far, had provided fake identity papers and their addresses were unverified. In an ongoing audit, ordered by the government to establish the genuineness of customers, DoT found that out of 10 lakh connections verified so far, more than 2 lakh had been issued to customers whose identity could not be established. The extent of fake identities has rattled the government which has started penalising service providers at Rs 1,000 for every fake user found. Sleuths suspect that the Mumbai attackers, like in the past, had obtained SIM cards on fake identity and had used it for communication with their handlers across the border. Though details are yet to be made public, officials have procured details of SIM cards from where they were procured and whose identities were used for the same.