No, no mobile company or anyone is allowed to or use your biometrics details taken during Aadhaar verification. The biometric details are encoded the moment you place your finger on the fingerprint sensor and this coded data is being sent to the UIDAI for further verification. Also, Regulation 17(1)(a) of the Aadhaar (Authentication) Regulations 2016, stringently forbids any requesting organization including any mobile phone companies, banks, etc from storing, publishing or distributing the finger-prints for any reason and neither will it hold a copy of any fingerprints. Any violation of this rule is a punishable offence under the Aadhaar Act 2016.