公开(公告)号：US20240422259A1

公开(公告)日：2024-12-19

申请号：US18697897

申请日：2022-12-14

Applicant: Elisa Oyj

Inventor： Marko Halme ,  Pekka Aalto ,  Tapio Hannula ,  Timo Junninen ,  Jukka Pietarinen ,  Kalle Tomi

IPC: H04M3/22 ,  H04W12/63 ,  H04W84/04

Abstract: A computer-implemented method for automatically detecting a fraud call. A call request is received from a caller device to initiate a voice call with a called device at a local Public Land Mobile Network (PLMN). The call request is identified originating from a foreign Public Land Mobile Network (PLMN). In response to detecting that a caller ID of the caller device is associated to a local Public Land Mobile Network (PLMN), current location information is requested from a database of the local Public Land Mobile Network (PLMN). If the location information indicates the caller device is attached to the foreign Public Land Mobile Network (PLMN), determining the call request as authentic; and if the location information indicates the caller device is attached to the local Public Land Mobile Network (PLMN), determining the call request as fraud.