US Patent 9813912 Secure adaptive device locking

Systems and methods for configuring user equipment (UE) for use with compatible subscriber identity modules (SIMs) is disclosed. The UE can include a UE SIMLock configuration containing one or more UE parameters and a value for each category. A compatible SIM can include a SIM configuration with compatible SIM values. The UE can request a UE SIMLock configuration from one or more telecommunications network devices using secure communications. The UE can receive a UE SIMLock configuration from the telecommunications network device. The UE SIMLock configuration can be applied to the UE modem governing SIMLock engine behavior. The UE SIMLock configuration can be updated dynamically with subsequent messages from the telecommunications network device to reflect changes in the account associated with the UE, such as the fulfillment of a contract or theft of the UE.