An electronic device , comprising: a memory configured to store a plurality of call settings to handle incoming calls; circuitry coupled with the memory , wherein the circuitry is configured to: receive a first call from a first caller party device associated with a first caller party, wherein identification information of the first caller party device of the first call is unknown to the electronic device ; transmit a first challenge message to the first caller party device based on the received first call; transmit a second challenge message to the first caller party device based on a first call setting of the stored plurality of call settings, wherein the first call setting is associated with the transmitted first challenge message, characterised in that the second challenge message indicates a request for the first caller party to call the electronic device back within a threshold time period; determine a time of receipt of a second call, different from the first call, received from the first caller party device ; and control the second call based on the threshold time period, the determined time of the receipt of the second call, and a second call setting of the stored plurality of call settings. a memory configured to store a plurality of call settings to handle incoming calls; circuitry coupled with the memory , wherein the circuitry is configured to: receive a first call from a first caller party device associated with a first caller party, wherein identification information of the first caller party device of the first call is unknown to the electronic device ; transmit a first challenge message to the first caller party device based on the received first call; transmit a second challenge message to the first caller party device based on a first call setting of the stored plurality of call settings, wherein the first call setting is associated with the transmitted first challenge message, characterised in that the second challenge message indicates a request for the first caller party to call the electronic device back within a threshold time period; determine a time of receipt of a second call, different from the first call, received from the first caller party device ; and control the second call based on the threshold time period, the determined time of the receipt of the second call, and a second call setting of the stored plurality of call settings. receive a first call from a first caller party device associated with a first caller party, wherein identification information of the first caller party device of the first call is unknown to the electronic device ; transmit a first challenge message to the first caller party device based on the received first call; transmit a second challenge message to the first caller party device based on a first call setting of the stored plurality of call settings, wherein the first call setting is associated with the transmitted first challenge message, characterised in that the second challenge message indicates a request for the first caller party to call the electronic device back within a threshold time period; determine a time of receipt of a second call, different from the first call, received from the first caller party device ; and control the second call based on the threshold time period, the determined time of the receipt of the second call, and a second call setting of the stored plurality of call settings. <EOS>