Samsung Galaxy Buds4 Pro Receive First Firmware Update — R640XXU0AZD2 at 8.55MB Brings Stability Improvements Rolling Out Globally From Korea to US and Europe

Galaxy Buds4 Pro — The First Update Arrives Quietly

Samsung's premium wireless earbuds, the Galaxy Buds4 Pro, have just received their inaugural firmware update. This initial patch, designated R640XXU0AZD2, arrived first in South Korea and weighs in at a modest 8.55MB. While the update is small, it's a significant step in ensuring optimal performance for users.

What Does the Update Include?

The latest update carrying version AZD2 doesn't introduce new features but focuses on stability improvements that aim to enhance overall device operation. Samsung has applied a stabilization code related to device performance. These types of updates are often subtle, but they play an important role in ensuring smoother functionality.

The exact impact of the update may differ depending on factors like region, device variant, and network environment, meaning users could notice varying degrees of improvement.

Global Expansion

The first update to the Galaxy Buds4 Pro, which initially rolled out in South Korea towards the end of last month, is now expanding to more global regions, including the US and Europe. Since the rollout has just started, it should take a few days to hit every unit, depending on the location.

Standard Buds4 and Buds3 Pro — Same Wave

Samsung has also started rolling out the first software update for the Galaxy Buds4 and the Galaxy Buds4 Pro to improve their stability.

Galaxy Buds3 Pro also received the May 2026 update with firmware version R630XXU0AZD2 at 8.28MB with a similar changelog referencing applied "stabilization code related to terminal operation."

How to Install the Update?

Open the Galaxy Wearable app on your phone. Go to "Earbuds settings" then "Earbuds software update." Tap "Download and install" if the update is available.