Step-by-step fixes for your phone and computer.
The short answer first, then each step with a screenshot labelled with the device and system version, and a link to the official source.
Fix it
Something not working? Start here.
- iPhoneWhere is Customization Service on One UI 8.5?▶ Video
- Android"Camera failed" on a Samsung Galaxy? 6 fixes▶ Video
- iPhoneiPhone alarm not going off? 8 things to check
- Android"Download pending" in Google Play? 6 fixes▶ Video
- iPhoneiPhone not ringing for calls? 9 settings to check
- Android"Google keeps stopping" on a Samsung Galaxy? 6 fixes▶ Video
- iPhoneiPhone notifications not showing? 7 settings to check
- AndroidAndroid Auto not working on a Samsung Galaxy? 6 fixes▶ Video
What changed in iOS 27
- How to turn on Dark Mode on an iPhoneDark Mode moved to the new Settings > Appearance page
- How to make text bigger on an iPhoneText Size moved to Settings > Appearance▶ Video
- How to change Display Zoom on an iPhoneDisplay Zoom moved to Settings > Appearance
- How to reduce the Liquid Glass effect on an iPhoneNew Liquid Glass slider, from Clear to Tinted
- How to turn off Connectivity Assist (Wi-Fi Assist) on an iPhoneWi-Fi Assist is now Connectivity Assist, under Wi-Fi
- iPhone showing the wrong time? How to fix the date and timeSet Automatically is now two switches: time and time zone
What changed in One UI 8.5
- How to show battery percentage on a Samsung Galaxy (One UI 8.5)The battery percentage switch is gone; the number sits in the icon
- How to reset network settings on a Samsung Galaxy phoneNetwork reset is now two resets: Wi-Fi and Bluetooth, and mobile
- Samsung Galaxy screen won't rotate? 5 fixesAuto rotate has separate switches for Home, Lock and call screens▶ Video
- Samsung lock screen notifications gone on One UI 8.5? FixLock screen notifications moved to a link at the bottom of Lock screen and AOD
Shown on the newest systems
iPhoneHow to change the video resolution and frame rate on an iPhoneiPhone · ▶ VideoHow to play Background Sounds like rain on an iPhoneAndroidHow to turn on Live Caption on a Samsung GalaxyAndroidHow to record your screen on a Samsung Galaxy
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More guides
Version named on every guideEach guide says which device and system version its screenshots show, and what to check if yours looks different.
Official sources linkedSteps link to the maker's own support pages, with the date the links were checked.
Free, no accountEvery guide and tool works straight away. Most tools keep your files on your own device.