End of Software Support
Samsung officially ends software support for 2021 Galaxy foldables and watches.
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Key Points
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The Galaxy Z Fold 3 and Galaxy Z Flip 3 received their final updates late last week, including the August Android security patch. The final U.S. build numbers were F926USQSHKZH2 for the Fold 3 and F711USQSIKZH2 for the Flip 3.
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The Galaxy Z Fold 3 and Z Flip 3 were introduced in August 2021 and had been promised four years of operating-system updates and up to five years of security updates; they shifted from monthly to quarterly updates in August 2025 before support ended.
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The Galaxy Watch 4 and Watch 4 Classic were significant Wear OS devices because they marked Samsung’s return to Google’s wearable platform and were the first watches built around the platform’s joint relaunch by Samsung and Google.
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Samsung is offering $50 for a Galaxy Watch 4 or Watch 4 Classic trade-in, while the Galaxy Z Fold 4 currently qualifies for a $200 instant trade-in discount.
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The Galaxy Z Flip 3 represented a substantial hardware step forward for Samsung’s foldables, adding a 120Hz inner display, a more useful 1.9-inch cover screen, IPX8 water resistance and dual speakers.
Samsung has ended software support for the Galaxy Z Fold 3 and Galaxy Z Flip 3, leaving millions of owners without security patches or OS updates WebProNews. The 2021 foldables received their final updates late last week, including the August Android security patch, after four years of major upgrades and up to five years of security fixes. The Galaxy Watch 4 and Watch 4 Classic have also reached end-of-life after five years of updates Android Police.
Why 2021 Foldables Lost Support
The Galaxy Z Fold 3 and Z Flip 3 were promised four years of major Android upgrades and up to five years of security patches gHacks. Samsung shifted both devices from monthly to quarterly security updates in August 2025 before ending support entirely. The final U.S. build numbers were F926USQSHKZH2 for the Fold 3 and F711USQSIKZH2 for the Flip 3 WebProNews.
Galaxy Watch 4 Marks End of Samsung-Google Partnership Era
The Galaxy Watch 4 and Watch 4 Classic represented a major milestone — they were Samsung's first smartwatches built on Google's Wear OS platform after the companies reunited Android Police. These watches launched as flagship devices and shaped the wearable market for years. Their discontinuation ends an important chapter in Samsung's wearable strategy.
Z Fold 4 and Flip 4 Enter Final Year of Updates
The Galaxy Z Fold 4 and Galaxy Z Flip 4 have moved into their final support year, shifting from monthly to quarterly security updates WebProNews. No major software upgrades are expected for these 2022 models going forward. Samsung is offering a $200 instant trade-in discount for the Z Fold 4, while older devices get lower values.
What This Means for Owners of Older Foldables
Owners of the 2021 Fold 3 and Flip 3 now face unpatched security vulnerabilities, including critical Android 15 flaws that Google published in September TechTimes. Samsung is offering $50 trade-in credit for the Galaxy Watch 4, though foldable trade-in values vary widely by model and carrier. Upgrading becomes more urgent as older devices fall behind on security protections.
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