Electronic device for limiting repeated registration attempts of roaming subscriber identification module and operating method thereof

An electronic device comprising:

• memory storing instructions;
• and
• at least one processor, comprising processing circuitry, for executing the instructions,
• wherein the instructions, when individually and/or collectively executed by the at least one processor, cause the electronic device to:
• attempt to register a roaming subscriber identification module (SIM), in response to changing a local SIM connected to a mobile network,
• identify whether the roaming SIM is successfully registered,
• when the registration of the roaming SIM is rejected, determine whether a count of consecutive registration rejections of the roaming SIM exceeds a threshold value, and
• based on the count of consecutive registration rejections of the roaming SIM exceeding the threshold value, control a radio frequency (RF) priority indicating a priority of using an RF resource of the roaming SIM and/or a waiting time for retrying the registration of the roaming SIM.

A method of operating an electronic device, the method comprising:

• detecting a change of country that provides a mobile network based on a broadcast message;
• determining a roaming subscriber identification module (SIM) and a local SIM based on the change of country;
• connecting to the mobile network via the local SIM;
• and
• preventing and/or reducing degradation of communication performance between the local SIM and the mobile network at least by restricting repeated resource requests of the roaming SIM for a radio frequency (RF) resource to register the roaming SIM with the mobile network.