Samsung may soon expand the One UI 8.5 beta update to more Galaxy devices, as new firmware builds have been spotted on its internal test servers. The Galaxy S23, Galaxy Z Fold 5, Galaxy Flip 5, and select Galaxy A series phones are expected to join the next phase. With this, Samsung will cover many of its older but essential smartphones with the new beta firmware. The beta firmware for all these listed Galaxy devices has been spotted on the CheckFirm database, and Tarun Vats first discovered it.
Though Samsung has yet to confirm these devices, after the last massive wave of flagship models, this time, Samsung is likely going to cover older flagship devices and mid-range phones. Here is the list of all devices that could enter the One UI 8.5 beta update testing program.
Galaxy S23 One UI 8.5 Beta Build Spotted
The latest test build for the Galaxy S23 is S918BXXU9ZZD1, and it is expected to be released on April 9 if the rumor is true. Furthermore, the tipster mentions that the second beta for the Galaxy S23 series will be released on April 23, after which it may receive a stable update.
Galaxy Z Fold 5 and Flip 5 Beta Firmware Details

After the Galaxy Z Fold 6 and Flip 6, the previous Galaxy Z Fold 5 and Flip 5 foldables are still among the best options. The firmware build spotted for these devices is F946NKSU6ZZD1 for the Fold 5 and F731NKSU6ZZD1 for the Flip 5. The firmware was spotted in South Korea, which may be the first to get the chance to enter the beta program.
Galaxy A35 and A36 One UI 8.5 Beta Builds Appear
After these premium flagship devices, Samsung is also bringing the One UI 8.5 beta program to the Galaxy A35 and Galaxy A36. There is also a chance the Galaxy A55 and Galaxy A56 will join the list, but no beta build has been spotted for them yet.
The beta firmware build for the Galaxy A35 is A356NKSU8ZZD1, and the Galaxy A36 has the A366EXXU8ZZD1 firmware build number. The latest build for the Galaxy A35 has been spotted on Samsung’s South Korean server, while the Galaxy A36 build has been spotted on the Indian server.
All these Galaxy devices are expected to receive the Samsung One UI 8.5 beta rollout over the next few days. The Galaxy S23 series and foldable phones will likely join the testing first, followed by Galaxy A series devices.
One UI 8.5 Release Date
The stable One UI 8.5 release date is not confirmed yet, but the latest rumors suggest it could arrive in the last week of April for the Galaxy S25 series. The upcoming One UI 9 version has also been spotted in the firmware database for the Galaxy S26 Ultra, so Samsung could release the current version for Galaxy devices in April and May for most models. You can follow our One UI 9 update tracker to get the latest news and leaks.














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