A method of identifying a user comprising: receiving (S412) a plurality of messages, by an access terminal, from a group of mobile devices operated by a group of users, wherein each of the plurality of messages comprises first demographics information corresponding to a respective user of the group of users such that the plurality of messages provides a group of first demographics information to the access terminal; capturing (S414), by the access terminal, a first biometrics instance from a user of a mobile device within the group of users; inferring (S416), by the access terminal from the first biometrics instance, second demographics information; determining (S418), by the access terminal, a plurality of candidate user mobile devices from the group of mobile devices using the second demographics information by comparing the second demographics information to each of the first demographics information in the group of first demographics information received from the group of mobile devices; transmitting (S420), to the plurality of candidate user mobile devices, the first biometrics instance or a derivative thereof; receiving (S424), from the plurality of candidate user mobile devices, a plurality of biometric match determinations, wherein each of the plurality of biometrics match determinations are based on a comparison of the first biometrics instance with second biometrics instances stored on the respective candidate user mobile devices; identifying (S426) the mobile device of the user from the plurality of candidate user mobile devices based on a positive biometric match determination received from said mobile device, wherein the positive biometric match determination indicates a match between the first biometrics instance and a second biometrics instance stored on the mobile device; and performing (S428), by the access terminal, a further interaction with said identified mobile device. receiving (S412) a plurality of messages, by an access terminal, from a group of mobile devices operated by a group of users, wherein each of the plurality of messages comprises first demographics information corresponding to a respective user of the group of users such that the plurality of messages provides a group of first demographics information to the access terminal; capturing (S414), by the access terminal, a first biometrics instance from a user of a mobile device within the group of users; inferring (S416), by the access terminal from the first biometrics instance, second demographics information; determining (S418), by the access terminal, a plurality of candidate user mobile devices from the group of mobile devices using the second demographics information by comparing the second demographics information to each of the first demographics information in the group of first demographics information received from the group of mobile devices; transmitting (S420), to the plurality of candidate user mobile devices, the first biometrics instance or a derivative thereof; receiving (S424), from the plurality of candidate user mobile devices, a plurality of biometric match determinations, wherein each of the plurality of biometrics match determinations are based on a comparison of the first biometrics instance with second biometrics instances stored on the respective candidate user mobile devices; identifying (S426) the mobile device of the user from the plurality of candidate user mobile devices based on a positive biometric match determination received from said mobile device, wherein the positive biometric match determination indicates a match between the first biometrics instance and a second biometrics instance stored on the mobile device; and performing (S428), by the access terminal, a further interaction with said identified mobile device. <EOS>