Nothing Phone (3a) and Phone (3a) Pro Receive Nothing OS 4.0 Open Beta Update

Highlights

• Nothing OS 4.0 based on Android 16 is now available as an open beta for the Nothing Phone (3a) and Phone (3a) Pro.
• The update introduces a refreshed icon pack and the new Lock Glimpse feature, offering curated wallpapers and dynamic lock screen content.
• Users must be on build Asteroids-V3.2-251013-1406 to join the beta before November 7, 2025.

Caption – Nothing OS 4.0 Open Beta for Nothing Phone (3a) and Phone (3a) Pro. (Image credit – Nothing Community)

Nothing has officially rolled out the Nothing OS 4.0 open beta update based on Android 16 for its Nothing Phone (3a) and Phone (3a) Pro models. This comes shortly after the update was made available for the Nothing Phone (3), Phone (2), Phone (2a), and Phone (2a) Plus earlier this month, keeping with the company’s promised timeline. Here’s all you need to know about the update.

Nothing OS 4.0 Beta Update – What’s New?

The latest Nothing OS 4.0 beta introduces several design refinements and new features aimed at enhancing the user experience.

The update brings a redesigned icon pack with a “refreshed visual language that’s lighter, more refined, and uniquely Nothing.” The company also notes that “further improvements” will be made based on user feedback during the beta phase.

Another major addition is the new Lock Glimpse feature, which introduces fresh, high-quality wallpapers curated to your preferences across nine categories. This feature can also display timely updates and relevant content to enhance your lock screen experience. In a future update, Lock Glimpse will allow users to showcase their personal photos on the lock screen for a more customised experience.

Aside from these, other Nothing OS 4.0 improvements remain consistent with what was rolled out to previous models.

How to Join the Open Beta Program?

Interested users can now join the open beta program for the Nothing Phone (3a) and Phone (3a) Pro, but they must first ensure their device is running the latest stable version. The required builds are:

• Phone (3a) – Asteroids-V3.2-251013-1406
• Phone (3a) Pro – Asteroids-V3.2-251013-1406

Before proceeding, Nothing strongly recommends backing up all personal data. The deadline to enrol in the beta program is November 7, 2025.

Steps to Install the Beta Update –

• Download and install the “Beta Updates Hub” .apk file.
• Go to Settings > System > Nothing Beta Hub.
• Tap “Join Beta” to register for the beta program.
• Once registered, tap “Go to Update” to begin installation.

If the update doesn’t appear automatically, you can manually check by navigating to Settings > System > System updates.

After successful installation, users can share their feedback via Settings > System > Feedback or through the official Nothing community forum.

How to Roll Back to a Stable Version?

If users want to revert to Nothing OS 3.5, Nothing has provided an official rollback option. However, it’s important to note that this process will factory reset the device and erase all user data.

Steps to Roll Back –

• Download the appropriate rollback package for your device.
• Go to Settings > System > Nothing Beta Hub.
• Tap “Import file” and select the downloaded package.
• Follow the on-screen instructions to complete the downgrade process.

With the beta rollout now available for the Nothing Phone (3a) and Phone (3a) Pro, more users can experience Android 16-based Nothing OS 4.0 ahead of its stable release.

FAQs

Q1. Which Nothing devices are now eligible for the Nothing OS 4.0 open beta?

Answer. The open beta update based on Android 16 is now available for Nothing Phone (3a) and Phone (3a) Pro, following earlier rollouts for Phone (3), Phone (2), Phone (2a), and Phone (2a) Plus.

Q2. What new features does Nothing OS 4.0 introduce?

Answer. Key additions include a redesigned icon pack with a lighter visual style and the new Lock Glimpse feature, offering curated wallpapers and dynamic lock screen content. Future updates will allow users to display personal photos on the lock screen.

Q3. How can users join or exit the Nothing OS 4.0 beta program?

Answer. To join, users must be on build Asteroids-V3.2-251013-1406, install the Beta Updates Hub APK, and register via Settings > System > Nothing Beta Hub. To exit, users can download the rollback package and follow the downgrade steps, which will factory reset the device.

Also Read –

https://www.mymobileindia.com/nothing-os-4-0-based-on-android-16-teased-ahead-of-rollout/

https://www.mymobileindia.com/nothing-os-4-0-based-on-android-16-coming-this-autumn-starting-with-phone-3/