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Download Samsung GALAXY WATCH4 SM-R870 - XAA - R870XXS2JZG3

Download the official firmware for GALAXY WATCH4 model SM-R870. This firmware is for the Us flag  XAA (XAA - United States) region.

PDA/AP Version: R870XXS2JZG3
Android Version: 16
File Size: 3.3 GB
Build Date: 2026-08-24

Please verify your model code before downloading. Check it in Settings → About Phone → Model Number, or in Download Mode. Use the Samfirm AIO Tool or Odin to flash this firmware on your GALAXY WATCH4. This firmware is sourced directly from Samsung official servers.

⚠ Samfirms.com is not responsible for any damage caused by incorrect firmware installation. Always backup your data before flashing.

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File size: 3.3 GB

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