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kusotare
User level: Level 1 (4 points)

Bad iPhone 11 Performance on iOS 26

Hi every one, i`m new at this community, but old user of iPhone.


The thing is that iPhone 11 is lagging like crazy on new iOS 26, the battery lives like 2-4 hours, programs are freezing like ****, the browser is lagging (Brave, Google, Safari), the phone is constantly overheating. The question is, can i somehow to roll back to iOS 18 or older?



Posted on Oct 21, 2026 6:09 AM

2 replies

IdrisSeabright
User level: Level 10 (201,695 points)

Oct 21, 2026 7:32 AM in response to kusotare

Also, check your battery health. Settings>Battery>Battery Health. If the maximum capacity is below 80%, you need a new battery. A failing battery will cause the phone to slow down.

WheelieNick
User level: Level 9 (74,110 points)

Oct 21, 2026 6:48 AM in response to kusotare

No, you cannot roll back your iPhone 11 to iOS 18 or older. Apple stops digitally signing older iOS firmware versions shortly after releasing new updates, which blocks the installation of any unsigned operating system files. 


for the lagging, have you tried a forced restart already ?


  1. Press and quickly release the volume up button.
  2. Press and quickly release the volume down button.
  3. Press and hold the side button.
  4. When the Apple logo appears, release the side button.


Originally posted at discussions.apple.com/thread/256380232