Each phone's own settings and modem file, against what that phone had before.
Was overrides_D421_D431_N104_D79.plist.
{ "SupportsOnDevicePhysicalSIMConvert": false, "SupportSecureIntent": false, "SupportedEntitlements": 23553, "ProtocolVersion": "2", "Authentication": { "Type": 1, "Username": "0$IMSI@nai.epc.mnc$MNC.mcc$MCC.3gppnetwork.org" }, "SupportsFallbackToLegacyFlow": false, "ServerAddress": "https://entitlement.ctm.net", "SupportPhysicalSIMtoESIMTransfer": false, "UpdatePeriod": 24, "SupportedActions": [ "AuthenticateTrustFlag", "TransferSIMService" ] }