iOS 26 Slow on iPhone 12? | How to Speed Up Any iPhone on iOS 26 (2026 Guide)
Is your iPhone suddenly slower after updating to iOS 26 or iOS 26.1?
In this video, I use two identical iPhone 12s side by side – one on iOS 18.7.2 and one on iOS 26 – to show you exactly why your phone can feel laggy after a major update… and then I walk you through 10 practical fixes to speed up ANY iPhone running iOS 26 or later.
This applies to:
• iPhone 11 series
• iPhone 12 / 12 mini / 12 Pro / 12 Pro Max
• iPhone 13 and 13 mini
• iPhone SE (2020 / 2022)
• And other devices that support iOS 26
If you updated just to keep your Apple Watch supported or to stay secure, but now your iPhone feels worse, this 2026 guide is for you.
In this video:
0:00 iOS 26 slow after update? Real-world example
0:25 Two iPhone 12s side by side – iOS 18 vs iOS 26
0:51 Why older iPhones can feel slower on iOS 26
1:27 Heavier animations, background indexing, and new features
2:14 Battery health, storage, and performance management explained
3:17 Fix #1 – Let iOS finish background indexing
3:37 Fix #2 – Proper restart after updating
3:55 Fix #3 – Free up storage (10–20% free space)
4:26 Fix #4 – Update all your apps
4:42 Fix #5 – Reduce animations and motion effects
5:13 Fix #6 – Tame Background App Refresh
5:40 Fix #7 – Clean up Location Services
6:03 Fix #8 – Battery health and Low Power / adaptive modes
6:33 Fix #9 – Reset all settings (without wiping data)
7:06 Fix #10 – Full backup + clean restore (last resort)
7:29 Should you avoid iOS 26 on older iPhones?
7:55 Final thoughts
If this video helps your iPhone feel faster on iOS 26, let me know which fix made the biggest difference in the comments. And if you know someone whose phone slowed down after updating, share this video with them before they waste money on a new device.
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