According to a partial international rollout schedule published by Samsung Thailand, the stable Android 17-based One UI 9 update for the Galaxy S26 series will expand beyond South Korea starting September 21, followed by a second wave on September 28 for the Galaxy S25, Galaxy Z Fold 7, and Galaxy Z Flip 7.
Samsung One UI 9 International Rollout Schedule and Phased Release Dates
Samsung has officially outlined the regional distribution timeline for its Android 17 software upgrade, known as One UI 9. Following the initial deployment for the Galaxy S26, Galaxy S26+, and Galaxy S26 Ultra in South Korea, the company’s Thailand division released documentation detailing how other markets and additional devices will receive the firmware, as reported by Sammobile.
The global distribution follows a strict phased approach. The first expansion wave kicks off on Monday, September 21, bringing the software to international markets for the flagship S26 lineup. A secondary wave follows exactly one week later on September 28, targeting the preceding generation of slab and foldable devices, specifically the Galaxy S25 mobile range alongside the Galaxy Z Fold 7 and Galaxy Z Flip 7 foldables.
Pro Tip: Major OS upgrades like One UI 9 generally require between one to two weeks to propagate through regional carrier networks and regional servers.
October Expansion for Galaxy S23 FE and Older Flagship Devices
Beyond the primary flagship rollouts slated for September, Samsung’s schedule maps out subsequent device categories for the following month. According to the published regional roadmap, the Galaxy S23 FE is scheduled to receive the Android 17 upgrade in October.
Furthermore, October marks the transition toward a broader ecosystem update. Devices anticipated to follow the Fan Edition model into the One UI 9 ecosystem include the Galaxy S24 series, the standard Galaxy S23 series, previous-generation foldable phones, newer Galaxy Tab S tablet models, and select mid-range Galaxy A smartphones. Provided the manufacturer maintains its traditional pacing, the vast majority of supported hardware is projected to run the new software by the end of the year.
Frequently Asked Questions
When does the One UI 9 international rollout begin?
According to Samsung Thailand’s schedule, the international expansion for the Galaxy S26 series starts on September 21.
Which devices are included in the second wave on September 28?
The second wave covers the Galaxy S25 mobile phones, the Galaxy Z Fold 7, and the Galaxy Z Flip 7.
When will older flagships like the Galaxy S24 series get Android 17?
Samsung’s rollout plan indicates that the Galaxy S24 lineup, along with the Galaxy S23 series and older foldables, will begin receiving updates starting in October.
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