This publication describes techniques and apparatuses directed to Public Land Mobile Network (PLMN) selection during international roaming. In aspects, roaming activity data is collected and compiled into a database of roaming activity data of Home PLMNs and associated Roaming PLMNs. The Roaming PLMNs are Visited PLMNs operated by a roaming partner that a subscriber’s operator has a roaming agreement with. An Optimized Preferred PLMN List (OPPL) is created from the compiled roaming activity data and the OPPL is stored on user equipment (UE). During international roaming, the UE can utilize the OPPL to determine a suitable PLMN for which to attempt registration, thereby avoiding the time and resources spent attempting to register to a randomly selected neighboring PLMN.
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Lin, Stan; Lo, Taylor; Mao, Rukun; Chiu, Terry; Lu, Lynn; and Nayak, Shivank, "Public Land Mobile Network Selection During International Roaming", Technical Disclosure Commons, (October 14, 2019)