Who is stronger in battery and performance?

iOS 26.5 Beta 1 brings improved RCS security and notification forwarding, but users need to consider stability compared to the official iOS 26.4 version.

Are you satisfied with the smoothness of the official iOS 26.4 version but are attracted by information about the RCS security feature or the ability to forward notifications on iOS 26.5 Beta 1? Does accepting to be a “guinea pig” for a test version really bring real value to daily work and entertainment, or will it entail unnecessary battery and temperature problems?

We need to look at actual data to know which is the right “landing” for our iPhone in early April.

Note: This test was performed on iPhone 17 Pro Max, each model will have different performance and battery life.

Please refer to the price list of iPhone 17 Series with the best support for the latest operating systems at Minh Tuan Mobile:

iOS 26.4 – Stable “King” for daily work

iOS 26.4 is officially considered Apple’s most complete version from the beginning of 2026. The most valuable point that users receive is the complete disappearance of the keyboard lag error and the “virtual memory full” situation that once caused discomfort.

Daily touch and swipe experience with Liquid Glass design language has reached maximum smoothness, instant response in all multitasking tasks. In particular, the battery life on this version is receiving a shower of compliments when it can maintain 8 to 10 hours of mixed use, giving us complete peace of mind during a long working day without having to worry about the power source.

iOS 26.5 Beta 1 – A step forward in connection and message security

In contrast to the quietness of the old version, iOS 26.5 Beta 1 focuses strongly on upgrading peripheral interaction capabilities. The biggest highlight is the new Modem Firmware update (from 1.55.04 to 1.60.00), which significantly improves 5G and Wi-Fi 7 reception in weak signal areas.

In addition, end-to-end encryption for RCS messages has officially returned, ensuring absolute privacy when iPhone users text with Android devices. Apple also added the “Notification Forwarding” option, allowing notifications to be synchronized to third-party wearable devices in a more professional way, no longer confined to the company’s ecosystem.

Detailed comparison table of parameters and actual experience

Below is a summary of the key differences to help us have the most intuitive view before deciding to upgrade:

Conclusion: Which version is suitable for your iPhone?

Choosing between these two versions depends entirely on the actual intended use. If you are using your iPhone as your main communication device for work, promoting peace of mind and the most durable battery life, iOS 26.4 is officially still the most ideal “landing point” right now. You will have a smoothly running system without facing any risks from testing software.

On the contrary, if users are technology enthusiasts who like to explore, often have to text cross-platform or need maximum stability in mobile network connection, iOS 26.5 Beta 1 is a journey worth trying. The ability to fix wallpaper errors and the new modem are real pluses that will enhance our personal experience.

Don’t forget to visit Minh Tuan Mobile system to receive support from a team of experienced technicians to check your device and advise on the safest software upgrade route. We are always ready to support customers through the Old Fall – Renew program with extremely high subsidies for users to own the super product iPhone 17 and master top technology in 2026 easily!