EVENT TRIGGERED NETWORK MIGRATION OF SUBSCRIBERS

A method includes receiving, by an equipment identity register application in the target mobile network, an International Mobile Equipment Identity (IMEI) of a user equipment (UE) associated with the subscriber and a Subscriber Identity Module (SIM) identifier (ID) identifying an inactive SIM card inserted into the UE or an inactive electronic SIM (eSIM) profile installed at the UE, determining that the UE is attempting to attach to the target mobile network for a first time based on the IMEI and the SIM ID, adding an event to an event queue of the target mobile network, and processing the event by accessing subscriber data stored at the source mobile network to validate that the IMEI of the UE is indicated in the subscriber data stored at the source mobile network, wherein the subscriber data includes a subscriber account indicated by the IMEI of the UE.