A CNET test found iOS 27 makes the 2019 iPhone 11 feel smoother and a bit faster, though the new AI Siri is not coming to it.
Apple's newest iPhone software, iOS 27, makes a 7-year-old iPhone 11 run smoother. A CNET tester put it on the oldest phone that can run it and found smoother animations, slightly quicker responses and higher test scores. The catch is that the new AI version of Siri is not part of the deal for this phone.
Apple says iOS 27 is faster on older iPhones. The tester checked by opening and rearranging icons in Control Center, the panel of quick settings. On iOS 26, the phone showed stutters and dropped frames, which means the screen skipped beats while moving. On iOS 27, the animations looked smoother and the 60Hz display felt stable.
Timed tests showed small gains. Photos appeared a split second sooner in the camera preview. Videos sent over AirDrop to a MacBook arrived faster. In every case the phone was milliseconds or a second or two quicker. The tester admits that is a close look, but says the gains add up.
A benchmark is a standard test that scores how fast a phone's processor is. Higher is better. Single-core measures one task at a time. Multicore measures many tasks at once.
The tester notes these scores do not fully reflect everyday use. Still, he says they show Apple's behind-the-scenes changes deliver noticeable gains.
The new AI Siri, which can pull details out of texts or emails, needs an iPhone 15 Pro or newer. The iPhone 11 keeps the standard Siri. For AI tools, its owner would need apps such as Google's Gemini or ChatGPT. The phone also lacks 5G, though the tester says nearly all services work fine over 4G and Wi-Fi.
Installing was not simple on a phone this old. The tester first had to find a Lightning cable, the older charging connector, to charge the phone enough for the download. The 128GB of storage was nearly full, so he deleted photos and apps before the update would fit.
His own phone was headed for a trade-in, so he did not keep it. He said that if he had to use it, he would replace the battery and the slightly cracked screen. He also expects the gains to be even bigger on newer models like the iPhone 13 and iPhone 14 series, though he did not test them.
On an older iPhone, free up storage and charge it fully before installing iOS 27, and expect smoother use but no new AI Siri.
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