Galaxy Watch6

SM-R945U

Release R945USQU2CZB6

USA · XAAAndroid 16Built 2/11/2026

Release information

Firmware identifiers

The software versions and region covered by this firmware update.

PDA: R945USQU2CZB6
CSC: R945UOYM2CZB6
Country: USA
Changelist: 33003255
Build date: 2/11/2026
Added to Samfrew: 3/16/2026

Supported networks

USA · CSC XAA · 7 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

AT&T

MCCMNC310410NWIDNW02088

AT&T Mobility

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

AT&T

MCCMNC311180NWIDNW02088

AT&T Mobility

UMTS 850UMTS 1900GSM 850

AT&T

MCCMNC310150NWIDNW00057

AT&T Mobility

UMTS 850UMTS 1900GSM 850

T-Mobile

MCCMNC310240NWIDNW02019

GSM 1900

Roaming partners (3)

AT&T

MCCMNC310280NWIDNW02171

AT&T Mobility

GSM 1900

AT&T

MCCMNC310280NWIDNW02172

AT&T Mobility

GSM 1900

T-Mobile

MCCMNC310260NWIDNW02019

T-Mobile US

5G 6005G 8505G 2500LTE 600LTE 1900LTE 1700GSM 1900