T-Mobile is the first US carrier to release the September security update for the Galaxy Z Flip 3. Other carriers and the unlocked model will likely follow soon. The update comes with firmware version F711USQU2AUI4. A changelog is not available at this time, but it's likely the update includes general stability and performance improvements similar to the one that released for international models at the start of the month.
If you purchased your Galaxy Z Flip 3 from T-Mobile (or MetroPCS), you should be able to download the update over the air from the Settings » Software update menu. If that does not work, wait a few hours and try again. Or you can just download the latest firmware from our archive and install it on your phone manually using a Windows PC if waiting isn't your thing.
And if you don't own a Galaxy Z Flip 3 but are wondering if it's worth your hard-earned money, do check out our initial review and our one-month experience with the device.
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