Name in the cause table
EPS QoS not accepted
Source: 3GPP TS 24.301 V20.1.0, clause 9.9.4.4, table 9.9.4.4.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
3GPP Scout / Reference / ESM causes / ESM causes #37 and #59
TS 24.301ESM cause
ESM causes #37 and #59: EPS QoS not accepted and Unsupported QCI value
Covers
TS 24.301 words these values in parallel, so they share this page. Each has its own section with the spec text and a plain explanation.
ESM cause #37: EPS QoS not accepted
In plain words
The network uses this cause when it cannot accept the new EPS QoS indicated in the UE request.
Our summary of the spec text quoted below.
When it is used
This ESM cause is used by the network if the new EPS QoS cannot be accepted that was indicated in the UE request.
Source: 3GPP TS 24.301 V20.1.0, clause B.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
ESM cause #59: Unsupported QCI value
In plain words
The network uses this cause when it cannot support the QCI indicated in the UE request.
Our summary of the spec text quoted below.
Name in the cause table
Unsupported QCI value
Source: 3GPP TS 24.301 V20.1.0, clause 9.9.4.4, table 9.9.4.4.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
When it is used
This ESM cause is used by the network if the QCI indicated in the UE request cannot be supported.
Source: 3GPP TS 24.301 V20.1.0, clause B.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Same causes in 5GS (TS 24.501)
TS 24.501 defines the corresponding causes for 5GS. Their pages quote the 5GS wording.
- 5GSM cause #37 (TS 24.501)
- 5GSM cause #59 (TS 24.501)
How this page was made
3GPP Scout built this page from TS 24.301 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 lines were 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.