The problem is related to the smartphone's home button, which contains a Touch ID thumbprint reader that can be used to unlock the device rather than inputting a four-digit security code.
bothata bo amanang le lapeng konopo ya smartphone a, e leng e na le li ama ID thumbprint 'mali hore e ka sebediswa ho notlolla sesebediswa e-na le inputting dipalo tse nne khoutu ya tshireletso.