The Nothing Phone (3a) series has started receiving the Nothing OS B4.0-251229-2335 update, and to be honest, this release focuses more on improvements than on groundbreaking new features. Furthermore, Nothing continues its philosophy of clean design by enhancing animations, system stability, and usability in everyday use.
However, like most Nothing OS updates, this rollout is being done gradually. Therefore, not every user will receive the firmware at the same time. This controlled release helps Nothing identify problems quickly and ensures a better experience for everyone.
So, let’s learn more about this new Nothing OS B4.0-251229-2335 update for the Nothing Phone (3a) series in today’s article.
Nothing OS B4.0 Visual Improvements
This update for the Nothing Phone (3a) brings several small but significant improvements. First, the battery percentage icon now displays the number inside the battery graphic. As a result, users can quickly check the remaining power without any extra effort.
Additionally, Nothing has improved the smoothness of the volume slider animation when adjusting the volume using the hardware keys. Consequently, the interaction feels smoother and more premium, especially during everyday use.
Meanwhile, the Extra Dark Mode has been optimized for better adjustment in varying lighting conditions. On the other hand, users who frequently use the Recorder app will notice smoother sound wave and wheel animations, making the recording playback experience more fluid and visually appealing.
General Improvements and Feature Enhancements
Beyond the visual enhancements, Nothing OS B4.0 introduces practical improvements that enhance everyday usability. A notable addition in this update is the ability for users to set different ringtones for each dual SIM card. This makes it easier to identify incoming calls without even looking at the screen.
Furthermore, vibration and haptic feedback have been optimized across more scenarios. As a result, touch responses feel more consistent and satisfying throughout the system.
Meanwhile, users who rely on Oticon Zircon 2 miniRITE T hearing aids will benefit from improved call sound volume. This leads to better call clarity during extended conversations.
Camera and Multimedia Improvements
This update also focuses on improving the camera experience. For example, Nothing has optimized power consumption during rear camera video recording. Therefore, users can now record longer videos without worrying about excessive battery drain.
Additionally, a long-standing issue where faces appeared blurry in close-range front camera shots has finally been fixed in this update. As a result, selfies now look sharper and more detailed.
Furthermore, Nothing has also fixed a watermark issue that displayed incorrect focal length or location data in photos. Consequently, photography enthusiasts can now rely on the metadata once again.
Most importantly, this update brings overall improvements to camera stability. Meanwhile, general multimedia usage feels smoother and more reliable after this update.
System Stability, Network Improvements, and Security
The main focus of Nothing OS B4.0 is on stability. First, display glitches in the status bar, quick settings, and notifications have been fixed. As a result, the UI looks cleaner and more consistent.
In addition, the pedometer widgets now offer improved stability, ensuring accurate tracking during daily activities. Network stability has also been enhanced, leading to fewer dropped calls and better connectivity.
Furthermore, overall system smoothness has been increased. Therefore, app switching, multitasking, and everyday navigation feel significantly faster.
From a security perspective, Nothing has updated Google Mobile Services (GMS) to the December 2025 version. The device now also runs on the December 2025 Android security patch, strengthening protection against known vulnerabilities. In short, Nothing listens to its users and is addressing their issues through these new updates, which is commendable.
Update Installation Notes and User Advice
Please note that during installation, your device may become temporarily warmer and consume more power. However, this behavior is completely normal. Battery performance and temperature levels will return to normal after the update is complete.
If you encounter any issues, you can send feedback directly from your device by going to Settings → System → Feedback. Your input will help Nothing improve future updates.
Nothing OS B4.0-251229-2335 Changelog Summary
| Category | Improvements |
|---|---|
| Visuals | New battery icon, smoother volume animation, improved dark mode |
| Audio | Dual SIM ringtones, better haptics, hearing aid optimization |
| Camera | Lower power usage, selfie blur fix, watermark correction |
| System | UI fixes, pedometer stability, smoother performance |
| Security | December 2025 GMS & security patch |
Should You Update Your Nothing Phone (3a)?
Without a doubt, this update is worth installing. Although it doesn’t introduce flashy new features, it significantly improves reliability, visual polish, and overall system behavior. Therefore, if you value smooth performance and long-term stability, updating makes complete sense.
Meanwhile, users focused on photography, battery efficiency, and clean UI consistency will notice immediate benefits. Consequently, Nothing OS B4.0 reinforces the brand’s commitment to thoughtful software refinement.
FAQs
Does the Nothing OS B4.0 update improve camera performance?
Yes, the update reduces battery consumption during video recording, fixes blurry front camera selfies at close range, corrects watermark issues, and improves overall camera stability.
What are the main improvements in Nothing OS B4.0?
Key improvements include smoother animations, a new battery percentage icon, better haptics, camera optimizations, network stability enhancements, and the December 2025 Android security patch.
Is Nothing OS B4.0 available for all users?
No, the rollout is staged and reaches users gradually.
Does this update improve battery life?
Yes, especially during rear camera video recording.
SEE ALSO:
- Nothing OS 4.0 Update with Android 16: New AI Features, Privacy & UI Changes
- Nothing Phone (3a) Lite Gets a New System Update: What’s New
- Nothing’s Big India Plan for 2026: Phone (4a), 4a Pro & CMF Phones Leaked
At Phone Jagat, we’ll continue to bring you every latest update related to the Nothing Phone (3a) series—so stay tuned.
