A limited pool of free phones were offered for those in need of financial aid including the HTC EVO and LG Optimus. The minimum requirement for a handset refresh was that the phone must continue to be an Android phone and the phone must support LTE. Through attrition (primarily due to study abroad and acquisition of an iPhone), the steady state of the study participants dropped down to roughly one hundred twenty augmented by twenty new enrollees in October of 2013.