The device is cool, is the battery stable?

iOS 26.4 Beta 3 version 2 officially fixes memory and call errors and supports a series of new Apple products in 2026.

True to the bustling roadmap of the new product launch week, Apple took a special step when re-releasing the Beta 3 of iOS 26.4 under the name Version 2.

With a new build code ending in the letter “K” (23E5223K), this update is not simply a performance tweak but also serves as the final “piece of the puzzle” to fully support the iPhone 17e, iPad Air M4 and the newly announced Studio Display 2026 screen line.

This is a signal that Apple is making every effort to bring absolute stability before releasing the official version to global users.

Improved support for new devices and refreshed user experience

The biggest change in iOS 26.4 Beta 3 Version 2 is the addition of full source code so that iPhone and iPad are perfectly compatible with accessories and peripheral screens of the 2026 generation. An interesting point is that Apple has “reset” the entire welcome screen (splash screen) in system applications. When you access Apple TV, you will see a new notice about Formula 1 racing copyright (Formula 1), or more in-depth instructions for using Tables in Freeform.

In terms of personalization, Apple has quietly prepared a database for new Emoji such as trombones, treasure chests or orcas. Although they are currently only visible as standby squares, they are expected to fully appear soon in the next Beta or RC version. This shows the careful preparation of the technical team to bring a new breeze to iPhone users’ conversations.

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Pragmatic patch: iMessage and calling issues resolved

The best news for users who often had trouble in the previous Beta is that the long list of errors has been fixed. The issue of iMessage not being able to send messages or images has completely disappeared, bringing clarity to conversations. In particular, the serious error that caused users in some areas (such as Proximus network in Belgium) to be unable to make outgoing calls has been prioritized and thoroughly resolved by Apple right in this Version 2.

Besides, the Spotlight smart search feature continues to show stability when displaying information faster and more accurately. The slight lag phenomenon when opening the App Library has been significantly improved. Although the Wallpaper bug still appears occasionally, the frequency has been greatly reduced, helping the user’s lock screen always look radiant and vibrant.

Breakthrough performance and impressive memory management

Regarding processing power, iOS 26.4 Beta 3 Version 2 recorded quite stable Geekbench scores with 3,764 single-core points and 9,737 multi-core points on the A19 Pro chip. The biggest plus point in the practical experience is the temperature. Even after running heavy performance benchmarks, the device still maintains a surprising coolness, showing that the “Apple House” coordination algorithm has reached maturity.

Regarding battery life, initial data shows that the system is still consuming a lot of energy during the indexing phase. Recorded the fact that the device consumes about 67% of the battery for more than 2 hours and 30 minutes of mixed use. However, an extremely positive signal is that the “System Data” error that took up hundreds of GB of memory has been completely fixed. Now, the free space on your iPhone will be returned to reality, without the virtual full notification causing frustration like before.

Summary: Who should upgrade right now?

All in all, if you are on the old iOS 26.4 Beta 3 or Public Beta 1 version, immediately upgrading to Version 2 is the absolutely right decision. Connection stability and memory security are the most compelling reasons to upgrade. For ordinary users, if you are not in a hurry to experience Siri 2.0, you can wait for the Release Candidate (RC) version expected to be released next week to have the most perfect experience.

Don’t forget to visit Minh Tuan Mobile system for dedicated technical support and advice on the latest Apple products. We will continue to update new developments on the iOS 26.4 release roadmap to send to users as soon as possible!