Samsung Galaxy Z Fold7 (SM-F966B) Firmware Overview
What is the latest SM-F966B firmware?
F966BXXSDCZJ1, released October 8, 2026 for region MM1 with Android 17. It is a security update on bootloader binary 13. The archive holds 4 official builds for this region.
Is the Samsung Galaxy Z Fold7 still getting updates?
Yes. The newest build is from October 2026.
Which Android versions did it get?
The SM-F966B builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: F966BXXUCCZIH (Sep 2026), 2 builds in total
- Android 16: F966BXXUABZF1 (Jun 2026), 2 builds in total
Can I downgrade the SM-F966B firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 10 to 13:
- Binary 13 — since Oct 2026
- Binary 12 — since Aug 2026
- Binary 10 — since Jun 2026
A phone already on binary 13 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 13 build. How to read a build number.
SM-F966B firmware for region MM1
How to Flash SM-F966B Firmware
Put the Samsung Galaxy Z Fold7 into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 13 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.