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Samsung has started rolling out the stable Android 16-based One UI 8 update to two mid-range models: the Galaxy M55 and the Galaxy M55s. The release brings the October 2025 security patch and a host of One UI improvements — and it’s already hitting handsets in India.
What’s new in the M55 and M55s update
The new build moves both phones to Android 16 under Samsung’s One UI 8 skin. Key details:
- Galaxy M55 firmware: M556BXXU4CYJ4 — download size ~2.6GB
- Galaxy M55s firmware: M558BXXU2CYJ4 — download size ~2.5GB
- Includes the October 2025 Android security patch
- One UI 8 features and polish: interface refinements, privacy improvements, and stability fixes
How to get the update now
If your M55 or M55s hasn’t prompted the update yet, you can try a manual check. On your phone go to Settings > Software update > Download and install. Because these are full OS upgrades, make sure you’re on Wi‑Fi, have at least 50% battery (or keep the phone charging), and consider backing up important data before installing.
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Rollout notes — what to expect
Samsung is deploying the stable One UI 8 package in India first as a staged OTA. That means the update may arrive in waves — some devices will get it immediately while others see it over the next few days. If you rely on your phone for work, you might want to wait a day or two to let early adopters surface any unexpected issues.
For readers outside India, keep an eye on your phone’s software update screen; regional rollouts typically follow soon after Samsung clears the initial distribution.
Source: gsmarena
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