This EF contains Fixed Dialling Numbers (FDN) and/or Supplementary Service Control strings (SSC). In addition it
contains identifiers of associated network/bearer capabilities and identifiers of extension records at the USIM ADF level. It may also contain an associated alpha-tagging. If this file is present in the USIM, the Enabled Services Table (EF EST) shall also be present.
It shall be possible to define if the UE uses the From header field for the determination of the originating party identity
in the OIP service. For more detailed description see TS 24.607, subclause 188.8.131.52.
If this file is present in both the USIM and the ISIM, the file in the ISIM is used. It is assumed that the
presence of this file in the USIM when an ISIM is present on the UICC is an incorrect configuration of