Galaxy Watch4 LTE (40 mm)

SM-R865F

Release R865FXXU2JZB6

Bulgaria · BGLAndroid 16Built 2/12/2026

Release information

Firmware identifiers

The software versions and region covered by this firmware update.

Bulgaria · CSC BGL · 3 carriers in 1 country

What is CSC?

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

A1 BG

MCCMNC28401NWIDNW01657

A1 Bulgaria

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

Vivacom

MCCMNC28403NWIDNW01448

BTC

5G 18005G 3500LTE 900LTE 1800LTE 2100UMTS 900UMTS 2100GSM 900

Yettel

MCCMNC28405NWIDNW02125

Yettel Bulgaria

5G 26005G 3500LTE 1800LTE 2100UMTS 900UMTS 2100GSM 900