A newly reported One UI 9 Call Brief time zone feature shows the other person's local time before an international call even connects, according to Android Authority's hands-on report published yesterday. The outlet tested the feature directly on a Galaxy Z Fold 8, watching the recipient's local time appear while dialing an international number, before the call went through.
That's the only device with confirmed, hands-on testing behind it. Android Authority also reports that Call Brief was originally available on the Galaxy Z Fold 8, Fold 8 Ultra, and Z Flip 8, and that it reached the Galaxy S26 series through the seventh One UI 9 beta, which began rolling out in late August.
Separately, two X users, @FrankOneDigital and @smasithick, spotted Call Brief surfacing a caller's local time when calling someone in a different time zone. Android Authority did not independently test those sightings, although @smasithick identifies a Galaxy S26 Ultra running One UI 9 Beta 7 in the linked post. The Fold 8 remains the only model Android Authority says it tested directly.
What follows separates what's confirmed from what's reported secondhand, and what's actually worth testing before assuming the prompt has, or hasn't, reached your phone.
What Call Brief's time zone prompt actually does
Call Brief is part of One UI 9's Personal Data Intelligence system, built to surface call-relevant context like related calendar events and messages tied to a contact, according to Android Authority. The feature now appears to add the other party's local time to that summary whenever the person being called is in a different time zone.
On the Galaxy Z Fold 8, the local time showed up while dialing an international number, before the call connected. That's the specific behavior Android Authority tested hands-on, not something relayed from another report. The X sightings mentioned above are user observations, not controlled tests, and the outlet didn't confirm which Galaxy models those users were running.
Samsung hasn't published anything explaining how Call Brief determines the other person's location. Whether it leans on area code, contact metadata, carrier data, or something else is a question the company hasn't answered. Nobody has addressed how the feature handles a ported number or a contact traveling outside their home time zone, either. Treat the prompt as a convenience, not a verified location signal, until Samsung documents the method.
What Samsung's own announcement does and doesn't confirm
Before sorting devices into tiers, it helps to separate two claims that get blurred together easily. Android Authority's reporting establishes that Call Brief reached the Galaxy S26 beta through the seventh One UI 9 update. It does not establish, through the outlet's own testing, that the local-time prompt specifically works on S26 phones.
Samsung's own announcement confirms an Aug. 28 feature update for existing Galaxy S26 One UI 9 beta users and lists several features bundled with it, including My FanCam, Now Brief, and an enhanced Now Nudge. It does not name Call Brief or the local-time prompt.
That omission doesn't disprove the feature. It just means the announcement can't serve as official confirmation of it. The only source tying Call Brief to the S26 at all is Android Authority's reporting, not Samsung's own release notes.
Which phones have the One UI 9 caller time zone prompt?
The evidence splits into tiers, and they carry different weight:
DeviceStatusGalaxy Z Fold 8Confirmed by hands-on testing from Android AuthorityGalaxy Z Fold 8 Ultra, Z Flip 8Reported as part of Call Brief's original device group; not independently testedGalaxy S26 seriesCall Brief confirmed to have reached the S26 beta in late August; the time-zone prompt itself is not independently verified on this deviceGalaxy Z Fold7, Z Flip7, S25, S25+, S25 Ultra, S25 FENewly eligible for the One UI 9 beta starting this month; no evidence either way on this specific feature
Samsung added that last group to the beta program in India, Korea, the U.K., and the U.S. last week, with sign-up through the Samsung Members app. Samsung's own notes caution that availability and timing may vary by market, so a phone qualifying for the beta doesn't mean enrollment opens immediately everywhere. Beta access to One UI 9 also isn't the same as confirmed access to Call Brief's time prompt; the expansion opens general OS testing, not a guaranteed path to this feature.
The sources reviewed here don't document the prompt on any Galaxy model outside these groups. That's an absence of reporting, not proof the feature is missing elsewhere.
How to test the Call Brief local time prompt
If you own a Galaxy Z Fold 8, dial an international number and watch Call Brief for the recipient's local time before the call connects. This is the only device with direct hands-on confirmation behind it, so a working prompt here matches what's already been tested.
If you're on a Fold 8 Ultra, Flip 8, or a Galaxy S26 running the seventh One UI 9 beta, testing is still worth doing. If the prompt doesn't appear, the available reporting doesn't say whether that reflects device support, rollout status, the specific number dialed, or another limitation entirely. Don't treat one failed test as definitive either way.
For anyone checking beta eligibility on a newly added model:
Open the Samsung Members app and look for a One UI 9 beta enrollment option under your device.
Confirm your region is one Samsung named for the expansion: India, Korea, the U.K., or the U.S. Availability and timing can still shift by market.
Know that beta enrollment provides testing access to One UI 9 generally, on the Z Fold7, Flip7, S25, S25+, S25 Ultra, or S25 FE, not confirmed access to Call Brief's time prompt specifically.
There's also nothing in the sources reviewed here about whether the prompt works on calls placed through WhatsApp, Google Meet, or other apps instead of the standard dialer. Everything demonstrated so far involves a standard call to a phone number, so treat app-based calling as untested territory for this specific feature until someone reports otherwise.
What to do next
Galaxy Z Fold 8: Test this now. Android Authority's hands-on report confirms the local-time prompt on this device, so dialing an international number should reproduce what's already been tested.
Fold 8 Ultra, Z Flip 8, and Galaxy S26 beta: Test if you have access, but treat the result as unverified either way. A successful sighting confirms the prompt appeared on that device and build; it doesn't establish that Call Brief works the same way across every unit running that software, and it doesn't explain how Samsung determines the other party's time zone.
Z Fold7, Z Flip7, and S25-series models: Beta eligibility, confirmed by Samsung last week, doesn't establish access to this specific feature. Wait for a device-specific report or Samsung's own release notes before expecting the prompt to show up once your beta arrives.
Across every tier, the same limits apply. The prompt has only been demonstrated on standard dialer calls to phone numbers, not on WhatsApp or Google Meet calls, and nobody outside Samsung has confirmed how the feature identifies where the other person actually is.
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