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Nothing Phone (4a) Pro - Nothing OS B4.1-260424-1447
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Nothing OS B4.1-260424-1447 Released for Phone (4a) Pro (April 28, 2026)

Key Points of This Article
  • Nothing has released the “Nothing OS B4.1-260424-1447” software update for the “Phone (4a) Pro” and published the release notes.
  • This is the first update for the “Phone (4a) Pro” since the “Nothing OS B4.1-260323-1635” software version, which was released at the time of the device’s launch.
  • The update includes the addition of the new AI-powered voice recognition feature “Essential Voice,” camera enhancements, and general improvements and bug fixes.

On Tuesday, April 28, 2026, the British venture firm Nothing Technologies Limited (Nothing) released the official release notes for the “Nothing OS B4.1-260424-1447” update, now rolling out to the “Phone (4a) Pro”—the latest and highest-end model in their popular Android “a” series, which launched in Japan on Wednesday, April 22, 2026.

This software update for the “Phone (4a) Pro” is the first since the initial software version, “Nothing OS B4.1-260323-1635,” which was delivered at the time of launch. The new “Nothing OS B4.1-260424-1447” update introduces the new AI-powered voice recognition feature “Essential Voice,” enhances camera capabilities, and includes general improvements and bug fixes.

“Essential Voice” is a new voice recognition feature integrated with AI. You can launch “Essential Voice” by tapping the “Essential Voice” icon on the keyboard or by long-pressing the “Essential Key” button while using the keyboard.

The “Nothing OS B4.1-260424-1447” update for the “Phone (4a) Pro” is being distributed sequentially via “Over the Air (OTA).”

■ “Essential Voice”
  • 🎙️ Cleans up transcriptions by filtering out interjections, filler words, and repetitions, while intelligently handling self-corrections.
  • 🔡 Real-time translation by detecting translation intent and inserting the translated text directly.
  • 🗃️ Stores personal phrases like email addresses, which are automatically inserted when the corresponding voice trigger is detected.
  • 📑 Automatically formats text into structured lists, steps, or bullet points when such content is identified from the speaker.
  • Note: Details about “Essential Voice” can be viewed via “Settings” > “Intelligence Toolkit” > “Essential Voice.”
■ Camera Enhancements
  • 📹 Supports seamless zoom (SAT) for 4K 30FPS recording, enabling smoother footage.
  • 🤳 AE/AF resets automatically when switching cameras, optimizing focus and exposure during shooting.
  • 😃 Optimized face tracking frames during recording.
  • 🦚 Optimized color balance and exposure accuracy for specific scenes.
  • 🔭 Improved focus stability at telephoto zoom levels.
  • 📷 Improved overall camera stability.
  • 🛝 Fixed a bug where the camera app would crash when importing certain presets from “Playground.”
■ General Improvements and Bug Fixes
  • 📱 Improved stability for the setup wizard and upgrades.
  • ⚙️ Improved overall system stability.
  • 🛡️ Android security patch level updated to “April 2026.”
“Nothing OS B4.1-260424-1447” update log for “Phone (4a) Pro”

Source: Nothing (https://nothing.community/d/56521-nothing-phone-4a-pro-nothing-os-b41-260424-1447-changelog)

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