iPhone

Explains that an eSIM is a digital SIM built into the iPhone and how to activate one during or after setup, using whichever method the carrier supports.

Overview of the ways to move to a new iPhone: Quick Start, iCloud, or a backup from Finder, Apple Devices or iTunes. Suggests having a backup and your Apple Account password ready.

Explains how to set up a new iPhone or iPad from a current iPhone running iOS 11 or later (or iPad running iPadOS 13 or later). Both devices should be updated and kept close together.

Covers what to try when a device will not activate or shows an activation server or unsupported SIM alert: restart, switch to Wi-Fi, wait and retry, or activate with a computer.

Checklist for when an eSIM will not activate: requirements, basic restarts, carrier settings updates and what details to have ready before calling the carrier.

Describes options for using data abroad with an eSIM: roaming on your own carrier, buying a travel eSIM and switching back when you return.

Explains how Personal Hotspot shares cellular data as a Wi-Fi network and how another device joins it over Wi-Fi, USB or Bluetooth.

Shows how to see what is using space on your device and how to offload or delete apps to free some up.

Explains how to send and receive photos and files with nearby Apple devices over AirDrop. Both devices need Wi-Fi and Bluetooth on.

Explains that the free 5 GB iCloud plan can fill up and stop backups and syncing, and lists ways to free space or upgrade.

Explains how iCloud Photos with Optimize Storage keeps full-size originals in iCloud and smaller copies on the device to save space.

Shows how to switch cellular data on or off for the whole device or per app, and how to check usage by app.

Explains how to cancel Apple subscriptions, including ones bought through App Store apps, on iPhone, Mac, Windows or the web.

Shows how to close an unresponsive app using the App Switcher and reminds you to do it only when an app is frozen.

Shows how to remove apps and warns that deleting an app does not cancel its subscriptions. Notes that some built-in apps cannot be removed.

Explains how to get apps from the App Store, find apps you have already bought, and what to do if the App Store is missing or a download fails.

Gives an escalating set of fixes for a misbehaving app: force close, restart, update, then reinstall, and finally contact the developer.

Fixes for Safari problems: change network, restart, clear website data and enable JavaScript, plus turning off Private Relay if only some sites fail.

Explains how to back up manually or turn on automatic iCloud Backup so a copy of your data exists if the device is lost or damaged.

Shows how to back up to a Mac using Finder (macOS Catalina or later), including the optional encrypted backup.

Explains how to erase all content and settings after backing up, and what credentials you will be asked for.

Describes moving your data and purchases to a new device from an iCloud backup, with or without the old device nearby.

Checklist for handing off a device: back up, move your information, confirm no repairs are pending, sign out of accounts and erase.

Shows where Mac and PC store device backups and how to delete or archive one from Finder or the Apple Devices app. Deleted backups cannot be recovered.

Troubleshooting steps for Face ID: update iOS, check settings, clear anything blocking the camera, restart and reset Face ID if needed.

Steps for a device that will not join Wi-Fi, from checking Airplane Mode to resetting network settings as a last resort.

Explains what the cellular status messages mean and how to fix them by toggling Airplane Mode, restarting, contacting the carrier and updating.

Covers common reasons an iOS update fails, such as an unsupported model, low storage or a slow download, and how to retry.

Explains how to force restart an iPhone that will not turn on or is frozen. The button sequence depends on the model.

Troubleshooting for dual SIM setups with an eSIM, including checking plans and the No Service message on the second line during calls.

Explains how to locate a missing device with Find My, mark it as lost and protect your accounts if it is not recovered.

Advice if a device is stolen: lock it through Find My, keep it on your Find My list, report the theft, erase it remotely if needed and check account security.

Explains how two-factor authentication protects your Apple Account with a password plus a six-digit code, and how to turn it on from a device or the web.

Explains how to set and change a passcode and the options for code type, including erasing the device after repeated failed attempts.

Covers locating a device on a map, playing a sound, marking it lost or erasing it from the Find My app or iCloud.com.

Explains the extra protection when the iPhone is away from familiar places: Face ID or Touch ID for sensitive actions and a one-hour delay for critical changes.

Explains how to arrange a battery repair or replacement, the estimated out-of-warranty fees and when AppleCare may cover it.

Explains how temperature and charging habits affect battery lifespan and notes that charging overnight is fine because the iPhone stops at full.

Ways to find what is using battery and save power, including checking daily usage, using Wi-Fi, Low Power Mode or Adaptive Power, and checking battery health.

States the operating temperature range and explains what happens when a device overheats, including what to do if a temperature warning appears.

Troubleshooting for slow or failed charging, including why it may pause at 80 percent and what to do about accessory warnings.

Explains how batteries lose capacity as they age and how iOS may manage performance. Shows where to see Battery Health.

Apple Support explains how to reset and restore an iPhone.

Apple Support (via Apple UK) shows how to restore an iPhone from an iCloud backup.

Apple Support covers transferring data and setting up a new iPhone.

Payette Forward walks through putting an iPhone in DFU mode and doing a DFU restore.

Technomentary shows how to put iPhones into recovery or DFU mode, covering all models according to the title. Button sequences vary by model, so check yours.

9to5Mac covers force restart, recovery mode, DFU and other restore options on the iPhone 16.