Peak performance, come immediately to fix errors

The iOS 26.4 RC update records a breakthrough in battery life and the ability to thoroughly fix keyboard errors, bringing a smooth experience to iPhone users.

The iOS 26.4 RC update has just officially appeared with build code 23E244, marking the final preparation step before Apple releases the widespread version to all users next week (expected March 23). With a capacity of up to 8.72 GB on iPhone 17 Pro Max, this is the largest software “general cleaning” since the beginning of 2026 until now.

Through practical experience, this version not only brings amazing smoothness but is also a solution to the battery problem and keyboard errors that have bothered many users for a long time.

Breakthrough performance and the ability to “correct” classic keyboard errors

The biggest plus point on iOS 26.4 RC is that Apple has officially confirmed and completely fixed the keyboard sensitivity error. The typing experience on iPhone 17 Pro Max is now extremely fast, accurate, and there is no longer the phenomenon of “scribbles” or slow response when texting quickly.

Benchmark scores recorded an impressive number of 3,820 single-core points and reached 9,977 multi-core points on the A19 Pro chip. These numbers show that iOS 26.4 RC has exploited the maximum hardware power, bringing a “snappy” feeling in every task.

The new operating system operates extremely smoothly, Liquid Glass transition effects become more natural and refined. In particular, the error “System data” taking up abnormal memory has been completely resolved, the available capacity on the device is always displayed correctly. Search speed on the App Store and Spotlight is also significantly faster, helping users’ work and entertainment process without any interruption.

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Battery life rating: 7 hours On-screen is promising

In terms of power, iOS 26.4 RC shows amazing power management capabilities. Through a practical test on a device with 41 charging cycles, users recorded 3 hours and 34 minutes of On-screen (SOT) usage while only consuming 50% of the battery.

This means that your iPhone can withstand more than 7-8 hours of continuous use with mixed tasks from surfing TikTok, watching YouTube to processing Apple Intelligence. This is extremely good news for those who often have to travel and work intensely without a backup charger nearby.

Notably, the vapor chamber cooling system on the new iPhone line combined with the coordination algorithm of iOS 26.4 helps the device maintain an extremely cool temperature, only about 31-32 degrees Celsius even when running Benchmark. Not overheating the device is also a key factor in extending battery life and maintaining stable performance throughout the day.

A series of AI features and a cool new interface

Besides battery and performance, iOS 26.4 RC also brings “worth the money” upgrades:

• Improved Apple Music: “Playlist Playground” feature uses AI to create mood-based playlists and suggest concerts near you.

• New Emoji Unicode 17: A series of unique symbols such as whales, trombones, and treasure chests have officially appeared, helping conversations become more lively.

• Smart security: Stolen Device Protection feature is now enabled by default, bringing absolute peace of mind to users.

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  Refined interface: The password input screen is moved to a balanced central position, the Liquid Glass-style wallpaper editing menu becomes more transparent and luxurious.

Should I upgrade to iOS 26.4 RC right now?

All in all, iOS 26.4 RC is an extremely safe, stable update and brings very high practical use value. If you are having battery problems or keyboard lag in old Beta versions or version 26.3.1, upgrading to RC is absolutely the right decision. This is the most complete version for you to be ready to welcome the upcoming Siri 2.0.

Don’t forget to visit Minh Tuan Mobile system to receive the most professional support from a team of technicians to check and update the software. We are always ready to advise on the iPhone 17 and iPhone 16 lines with the Old Fall – New policy with extremely good subsidies for you to confidently master top technology in 2026!