Galaxy S21 5G

SM-G991B

Release G991BXXSJHZC2

Latest

Poland · XEOAndroid 15Built 3/9/2026

Release information

Firmware identifiers

The software versions and region covered by this firmware update.

Poland · CSC XEO · 7 carriers in 1 country

What is CSC?

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

1Global OperationsMVNO

MCCMNC26033NWIDNW01370

Cyfrowy PolsatMVNO

MCCMNC26012NWIDNW00341

Cyfrowy Polsat S.A.

Orange

MCCMNC26003NWIDNW00958

Orange Polska S.A.

5G 21005G 3500LTE 1800LTE 2100GSM 900

Orange

MCCMNC26003NWIDNW01976

Orange Polska S.A.

5G 21005G 3500LTE 1800LTE 2100GSM 900

Play

MCCMNC26006NWIDNW01006

P4 Sp. z o.o.

5G 21005G 3500LTE 800LTE 1800LTE 2100LTE 2600UMTS 900GSM 1800

Play

MCCMNC26098NWIDNW01006

P4 Sp. z o.o.

LTE 1800

Plus

MCCMNC26001NWIDNW01046

Polkomtel Sp. z o.o.

5G 2100LTE 900LTE 1800LTE 2100LTE 2600UMTS 900UMTS 2100GSM 900GSM 1800TD-5G 2500

T-Mobile

MCCMNC26002NWIDNW01321

T-Mobile Polska S.A.

5G 21005G 3500LTE 900LTE 1800LTE 2100GSM 900GSM 1800