Phones
It’s not official version, Samsung Galaxy S21 testing One UI 5.1 build

Samsung already started testing the next One UI version on several Galaxy devices including Galaxy S21, Galaxy S22, A52s, and more. Now, the company is testing new One UI 5.1 firmware on Samsung Galaxy S21, Galaxy S21 Plus, and Galaxy S21 Ultra smartphones.
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In a recent development, the One UI test build detection app Checkfirm has spotted a new One UI build for the Samsung Galaxy S21 series. The smartphones in this series already received the One UI 5 update, so apparently, it is testing the next One UI version i.e. One UI 5.1.
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One UI 5.1 testing is going on in Germany and India for the Galaxy S21 series smartphones. It is going underway with version G99xBXXU6EWAE for Galaxy S21, Galaxy S21 Plus, and Galaxy S21 Ultra.
Samsung is going to launch the Galaxy S23 series smartphone on February 01, 2023, at Galaxy Unpacked 2023 event. The next Galaxy S series smartphones will come pre-installed with the One UI 5.1 version and its amazing features.
After that, Samsung will soon release an Android 13-based One UI 5.1 update to other flagship smartphones including the Galaxy S22 series, Galaxy S21 series, Galaxy Fold 4, Galaxy Flip 4, and more.
News
Exynos is not rebranding but Dream Chip indeed exists, Samsung states

Recently, it was rumored that Samsung is going to rebrand Exynos as Dream Chip. In a recent development, it has been reported that Samsung Semiconductor disclosed Exynos is not rebranding to Dream Chip anytime soon.
In addition, the company’s semiconductor decision revealed that Dream Chip is an internal project name. Earlier, Samsung formed a Dream Team to research a chipset tailor-made for flagship Galaxy devices.
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If Dream Chip is an internal project name, the existence of a Galaxy-exclusive chipset just confirmed. However, it will take time for the company to finally commercialize the processor on Galaxy smartphones.
“All rumors regarding rebranding are not true,” Samsung Semiconductor told us in response to AndroidAuthority’s follow-up question.
Phones
Samsung’s Exynos might be coming as Dream Chip next year

Back in October, Samsung unveiled the Exynos 2400 chipset, which is rumored to power Galaxy S24 and S24 Plus in certain markets. The company itself announced its new flagship SoC as “Exynos 2400” while a tipster claims that the Dream Chip coming next year.
Tipster OreXda on X revealed that Samsung will be rebranding Exynos to Dream Chip. It’s a brand inspired by the Dream Team, which the company established to create a chipset tailor-made for Galaxy flagships. If the claim is true, the Galaxy S24’s Exynos 2400 could be advertised as Dream Chip.
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Next year, Samsung will be bringing back its dual chipset strategy for Galaxy S flagships. Notably, the S23 is solely powered by Snapdragon 8 Gen 2 chipset. The S21 series was shipped with Exynos 2100 and Snapdragon 888, while the S22 series with Exynos 2200 and Snapdragon 8 Gen 1.
Phones
Samsung Galaxy A15 4G/5G use MediaTek SoCs, Exynos 1280 powers the A25 5G

Samsung will launch various new mid-range and affordable phones in 2024. Prior to the official announcement, we’ve got some exciting news about the chipsets used in upcoming Galaxy A phones.
According to the info, Samsung Galaxy A15 4G is powered by MediaTek Helio G99. The smartphone’s 5G variant uses MediaTek Dimensity 6100+ chipset. Besides, Samsung’s Exynos 1280 could power the Galaxy A15 5G device.
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This leak comes from a reliable leakster Roland Quandt, who earlier spotted Galaxy A15 5G’s listing on Walmart. The company could unveil the Galaxy A15 4G/5G smartphone next month, with release expected in early 2024.
Samsung Galaxy A15 4G: MTK Helio G99 MT6789V
Samsung Galaxy A15 5G: MTK Dimensity 6100+ MT6835VSamsung Galaxy A25 5G: Exynos 1280.
— Roland Quandt (@rquandt) November 28, 2023