3GPP Scout / Reference / 5GSM causes / 5GSM cause #33

TS 24.5015GSM cause

5GSM cause #33: Requested service option not subscribed

TS 24.501 V20.1.0Clause 9.11.4.2Value 33 (bits 0010 0001)Checked 2026-10-15

In plain words

This cause is sent when the UE requests a service option for which it has no subscription.

Our summary of the spec text quoted below.

What the spec says

Name in the cause table

Requested service option not subscribed

Source: 3GPP TS 24.501 V20.1.0, clause 9.11.4.2, table 9.11.4.2.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.

When it is used

This 5GSM cause is sent when the UE requests a service option for which it has no subscription.

Source: 3GPP TS 24.501 V20.1.0, clause B.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.

Same cause in EPS (TS 24.301)

TS 24.301 defines the corresponding cause for EPS. Its page quotes the EPS wording.

How this page was made

3GPP Scout built this page from TS 24.501 V20.1.0 as indexed on 2026-10-15. The quotes are copied from the spec, and code checks each one against the stored text and the 3GPP archive file before publishing. The plain-words line was written by an AI model (GPT-6 Sol) and checked against the quotes by a second AI model from another company (Claude Opus 5.5). The official 3GPP text governs.