The ‘Find Phone’ function in some Huawei smart phones with software earlier than Duke-L09C10B186 versions, earlier than Duke-L09C432B187 versions, earlier than Duke-L09C636B186 versions has an authentication bypass vulnerability. Due to improper authentication realization in the ‘Find Phone’ function. An attacker may exploit the vulnerability to bypass the ‘Find Phone’ function in order to use the phone normally.