4.2.1 EF_LI (Language Indication)

31.1023GPPCharacteristics of the Universal Subscriber Identity Module (USIM) applicationRelease 17TS

This EF contains the codes for one or more languages. This information, determined by the user/operator, defines the preferred languages of the user in order of priority. This information may be used by the ME for MMI purposes. This information may also be used for the screening of Cell Broadcast messages in a preferred language, as follows.

When the CB Message Identifier capability is available, the ME selects only those CB messages the language of which corresponds to an entry in this EF or in EF_PL, whichever of these Efs is used (see clause 5.1.1). The CB message language is defined by the Data Coding Scheme (DCS: see TS 23.038 [5]) received with the CB message. The ME shall be responsible for translating the language coding indicated in the Data Coding Scheme for the Cell Broadcast Service (as defined in TS 23.038 [5]) to the language coding as defined in ISO 639 [19] if it is necessary to check the language coding in EF_PL.

Identifier: ‘6F 05’		Structure: transparent			Optional
SFI: ’02’
File size: 2n bytes, (n ≥ 1)			Update activity: low
Access Conditions: READ ALW UPDATE PIN DEACTIVATE ADM ACTIVATE ADM
Bytes	Description			M/O		Length
1 to 2	1st language code (highest priority).			M		2 bytes
3 to 4	2nd language code			O		2 bytes
2n-1 to 2n	Nth language code (lowest priority).			O		2 bytes

Coding:

each language code is a pair of alpha-numeric characters, defined in ISO 639 [19]. Each alpha-numeric character shall be coded on one byte using the SMS default 7-bit coded alphabet as defined in TS 23.038 [5] with bit 8 set to 0.

Unused language entries shall be set to ‘FF FF’.