CMF, the sub-brand of Nothing, has officially started rolling out Nothing OS 4.0 to its smartphone users in India. The update, which is based on Android 16, is now reaching CMF Phone 1 users first, while CMF Phone 2 Pro users are expected to receive the update starting early January.
The announcement was made on Friday, December 26, 2025, marking a major software milestone for CMF devices in the Indian market. The company confirmed that the rollout will happen in phases, ensuring system stability and performance before wider availability.
Rollout Timeline: Phone 1 First, Phone 2 Pro Next
According to CMF, the Nothing OS 4.0 update is currently being pushed to:
Users will receive the update as an OTA (Over-The-Air) package. Since the release is phased, it may take a few days before all eligible devices receive the update notification.
Refined UI and Visual Enhancements Across the System
Nothing OS 4.0 introduces a refined user interface with noticeable improvements across the system. CMF says the update brings:
These changes aim to provide a more consistent and visually balanced experience while maintaining Nothing’s signature minimal design language.
Extra Dark Mode: Deeper Blacks and Better Power Efficiency
One of the most highlighted features of Nothing OS 4.0 is Extra Dark Mode. This enhanced dark mode is designed to:
The refined dark mode enhances visibility across notifications, Quick Settings, and the app drawer, while also extending support to Nothing’s first-party apps such as Essential Space.
Improved Readability and First-Party App Support
With Nothing OS 4.0, CMF has focused heavily on readability and user comfort. The interface now offers improved text contrast and spacing, making it easier to read content in low-light conditions.
The update ensures that Nothing’s own apps are fully optimized for the new design language, delivering a consistent experience across the system.
More Widget Sizes and Home Screen Customisation
Home screen customisation gets a significant upgrade with new widget sizing options. Users can now choose 1×1 and 2×1 widget layouts for apps like:
This allows users to personalise their home screens more efficiently, making better use of available space while keeping essential information easily accessible.
Enhanced Multitasking with Improved Pop-Up View
Nothing OS 4.0 also improves multitasking through a more polished pop-up view. Apps opened in pop-up mode now feel smoother and more responsive, making it easier to switch between tasks without breaking workflow.
This enhancement is particularly useful for users who frequently multitask between messaging, browsing, and productivity apps.
App Drawer Enhancements: Hidden Icons Feature
A notable addition in the new update is the ability to hide apps from the App Drawer. With hidden icons support, users can now:
This feature adds an extra layer of control over how apps are displayed on the device.
Smoother Animations and Improved Haptics
CMF claims that Nothing OS 4.0 delivers smoother, more tactile animations across the system. Touches, swipes, and gestures now feel more natural, with refined motion effects and subtle rebounds in notifications.
In addition, the update introduces haptic feedback at volume limits, providing physical feedback when users reach maximum or minimum volume levels.
Overall Performance and User Experience Improvements
While visual upgrades take centre stage, Nothing OS 4.0 also focuses on overall system smoothness and stability. The company states that the update improves responsiveness, reduces animation jitter, and enhances daily usability without compromising performance.
How to Check for the Update
CMF Phone users in India can manually check for the update by navigating to:
Settings → System → Software Update
Users are advised to ensure sufficient battery life and stable internet connectivity before installing the update.
The rollout of Nothing OS 4.0 based on Android 16 represents a major step forward for CMF smartphones in India. With features like Extra Dark Mode, refined UI elements, improved multitasking, and deeper customisation options, the update significantly enhances the overall user experience.
As the phased rollout continues over the coming days, CMF Phone 1 and Phone 2 Pro users can look forward to a cleaner, smoother, and more power-efficient operating system experience.
