Galaxy S24

SM-S921U1

Release S921U1UEU5DZDR

USA · XARAndroid 16Built 4/29/2026

Release information

Firmware identifiers

The software versions and region covered by this firmware update.

USA · CSC XAR · 5 carriers in 2 countries

What is CSC?

CSC is Samsung's region and carrier customization. The networks below are included in this release.

AT&T

MCCMNC310410NWIDNW02171

AT&T Mobility

5G 8505G 37005G 39000LTE 700LTE 850LTE 1700LTE 1900LTE 2300UMTS 850UMTS 1900GSM 850GSM 1900

AT&T

MCCMNC311180NWIDNW02171

AT&T Mobility

UMTS 850UMTS 1900GSM 850

AT&T

MCCMNC310950NWIDNW02171

AT&T Mobility

GSM 850

AT&T

MCCMNC310410NWIDNW02172

AT&T Mobility

5G 8505G 37005G 39000LTE 700LTE 850LTE 1700LTE 1900LTE 2300UMTS 850UMTS 1900GSM 850GSM 1900

AT&T

MCCMNC311180NWIDNW02172

AT&T Mobility

UMTS 850UMTS 1900GSM 850

AT&T

MCCMNC310950NWIDNW02172

AT&T Mobility

GSM 850

TEST

MCCMNC00101NWIDNW00156

Test network

AT&T

MCCMNC310280NWIDNW02171

AT&T Mobility

GSM 1900

AT&T

MCCMNC310280NWIDNW02172

AT&T Mobility

GSM 1900