4.2.28 EF_SMSS (SMS status)

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

If service n° 10 is "available", this file shall be present.

This EF contains status information relating to the short message service.

Identifier: ‘6F43’		Structure: transparent			Optional
File size: 2+X bytes			Update activity: low
Access Conditions: READ PIN UPDATE PIN DEACTIVATE ADM ACTIVATE ADM
Bytes	Description			M/O		Length
1	Last Used TP‑MR			M		1 byte
2	SMS "Memory Cap. Exceeded" Not. Flag			M		1 byte
3 to 2+X	RFU			O		X bytes

‑ Last Used TP‑MR.

Contents:

– the value of the TP‑Message‑Reference parameter in the last mobile originated short message, as defined in TS 23.040 [6].

Coding:

– as defined in TS 23.040 [6].

‑ SMS "Memory Capacity Exceeded" Notification Flag.

Contents:

– this flag is required to allow a process of flow control, so that as memory capacity in the UE becomes available, the Network can be informed. The process for this is described in TS 23.040 [6].

Coding:

b1=1 means flag unset; memory capacity available;

b1=0 means flag set;

b2 to b8 are reserved and set to 1.