Upgrading to iOS 26 may cause iPhone 11 lag and battery drain
First reported on r/ios on June 25, 2026.
Some users are reporting that upgrading to iOS 26 on their iPhone 11 has caused lag and rapid battery drain.
What it looks like
- lag
- battery drain
How to fix it
- Restart your iPhone.
- Check for software updates.
- Reset all settings.
Affected products
- iPhone 11
Sources
- IPhone 11 to iOS 26 — reddit:r/ios
Search terms covered: ios 26 lag, ios 26 battery drain, iphone 11 ios 26 issue