Telecommunications firms in India have asked the Prime Minister's Office for access to the country's biometrics-backed unique ID data to speed up subscriber verification.The operators want to use the Aadhaar database to migrate to an online system of subscriber verification, reported The Economic Times.Usiing the Aadhaar database to sell SIM cards or connections will be a more convenient, secure and cost-effective way than the current system and it will also help enable instant activations, telecoms staff told the newspaper.However, industry insiders said the home ministry isn't convinced that biometric authentication is a foolproof system for establishing a mobile customer's proof of address.Earlier this month, the Supreme Court ruled that an Aadhaar card is not mandatory for using government welfare schemes, saying that this could violate a citizen's privacy.