▁in ▁future . ▁O sa if u - Ke it ai ▁can ▁provide ▁more ▁convenient ▁services ▁than ▁pl astic ▁F eli Ca ▁cards . ▁For ▁instance , ▁it ▁can ▁automatically ▁re charge ▁itself ▁via ▁the ▁Internet , ▁or ▁provide ▁the ▁latest ▁information . ▁It ▁can ▁also ▁be ▁used ▁as ▁a ▁ticket ▁for ▁an ▁air plane ▁or ▁an ▁event , ▁by ▁downloading ▁an ▁electronic ▁ticket . ▁Un like ▁pl astic ▁cards , ▁a ▁single ▁O sa if u - Ke it ai ▁phone ▁may ▁accept ▁multiple ▁applications , ▁each ▁equivalent ▁to ▁different ▁cards . ▁ ▁Dis adv antages ▁O sa if u - Ke it ai ▁provides ▁many ▁functions ▁on ▁a ▁single ▁mobile ▁phone . ▁Therefore , ▁there ▁is ▁a ▁great ▁risk ▁if ▁the ▁phone ▁is ▁lost , ▁broken , ▁or ▁st olen . ▁O sa if u - Ke it ai ▁basically ▁functions ▁even ▁without ▁radio ▁transm issions , ▁so ▁the ▁applications ▁can ▁not ▁be ▁terminated ▁just ▁by ▁closing ▁a ▁phone ▁account . ▁A ▁user ▁has ▁to ▁contact ▁each ▁service ▁provider ▁to ▁stop ▁all ▁the ▁functions . ▁There ▁are ▁some ▁ph ones ▁that ▁can ▁lock ▁the ▁functions ▁via ▁a ▁phone ▁call ▁or ▁an ▁E - mail . ▁ ▁Since ▁O sa if u - Ke it ai ▁can ▁function ▁as ▁identity ▁card ▁( such ▁as ▁member ▁card , ▁company ▁card , ▁or ▁key card ), ▁there ▁is ▁also ▁a ▁risk ▁for ▁those ▁who ▁authentic ate ▁it . ▁ ▁Services ▁ ▁See ▁also ▁Mobile ▁payment ▁Electron ic ▁money ▁F eli Ca ▁ ▁External ▁links