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Samsung Galaxy Watch4 (SM-R870) Android 16 firmware update R870XXU2JZC2 – KOREA | SamFrew

Home / Devices / Galaxy Watch4 / SM-R870 / KOO

Galaxy Watch4

SM-R870

Release R870XXU2JZC2

KOREA · KOOAndroid 16Built 3/9/2026

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KOO-R870XXU2JZC2-20260319133750.zip

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File size3.3 GB

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This file is also the factory firmware for this release.

Release information

Firmware identifiers

The software versions and region covered by this firmware update.

PDA: R870XXU2JZC2
CSC: R870OXM2JZC2
Country: KOREA
Changelist: 33003255
Build date: 3/9/2026
Added to Samfrew: 3/15/2026