If your device has been struggling with bugs and/or performance issues on iOS 12, iOS 13.3.1, iOS 13.3, iOS 13.2.3, iOS 13.2.2, iOS 13.2, iOS 13.1.3, iOS 13.1.2, iOS 13.1.1, iOS 13.1, or iOS 13.0, think about giving iOS 13.4 a shot.
iOS 13.4 includes a long list of bug fixes for your iPhone:
- Fixes an issue in Camera where the viewfinder may appear as a black screen after launch
- Addresses an issue where Photos may appear to use excess storage
- Resolves an issue in Photos that may prevent sharing an image to Messages if iMessage is disabled
- Fixes an issue in Mail where messages may appear out of order
- Addresses an issue in Mail where the conversation list may display empty rows
- Resolves an issue where Mail may crash when tapping the Share button in Quick Look
- Fixes an issue in Settings where cellular data may incorrectly display as off
- Addresses an issue in Safari where webpages may not be inverted when both Dark Mode and Smart Invert are active
- Resolves an issue where text copied from web content may appear invisible when pasted when Dark Mode is active
- Fixes an issue in Safari where a CAPTCHA tile may display incorrectly
- Addresses an issue where Reminders may not issue new notifications for an overdue recurring reminder until it is marked as completed
- Resolves an issue where Reminders may send notifications for completed reminders
- Fixes an issue where iCloud Drive appears to be available in Pages, Numbers, and Keynote even when not signed in
- Addresses an issue in Apple Music where music videos may not stream in high quality
- Resolves an issue where CarPlay may lose its connection in certain vehicles
- Fixes an issue in CarPlay where the view in Maps may move away briefly from the current area
- Addresses an issue in the Home app where tapping an activity notification from a security camera may open a different recording
- Resolves an issue where Shortcuts may not appear when tapping on the Share menu from a screenshot
- Improves the Burmese keyboard so punctuation symbols are now accessible from numbers and symbols
If you've noticed these issues on your iPhone, you'll want to install iOS 13.4 today, or, at some point in the near future.
If you skipped iOS 13.3.1, you get its fixes with your iOS 13.4 update. iOS 13.3.1 included:
- A fix for an issue in Communication Limits that could allow a contact to be added without entering the Screen Time passcode
- A fix for an issue that could cause a momentary delay before editing a Deep Fusion photo taken on iPhone 11 or iPhone 11 Pro
- A fix for an issue with Mail that could cause remote images to load even when the “Load Remote Images” setting is disabled
- A fix for an issue that could cause multiple undo dialogs to appear in Mail
- A fix for an issue where FaceTime could use the rear facing ultra-wide camera instead of the wide camera
- A fix for an issue where push notifications could fail to be delivered over Wi-Fi
- A fix for a CarPlay issue that could cause distorted sound when making phone calls in certain vehicles
If you skipped iOS 13.3, you get its bug fixes with your upgrade to iOS 13.4. Here's the full list:
- A fix for an issue in Mail that may prevent downloading new messages
- A fix for an issue that prevented deleting messages in Gmail accounts
- A fix for issues that could cause incorrect characters to display in messages and duplication of sent messages in Exchange accounts
- A fix for an issue where the cursor may not move after long pressing on the space bar
- A fix for an issue that may cause screenshots to appear blurry when sent via Messages
- A fix for an issue where cropping or using Markup on screenshots may not save to Photos
- A fix for an issue where Voice Memos recordings may not be able to be shared with other audio apps
- A fix for an issue where the missed call badge on the Phone app may not clear
- A fix for an issue where the Cellular Data setting may incorrectly show as off
- A fix for an issue that prevented turning off Dark Mode when Smart Invert was enabled
- A fix for an issue where some wireless chargers may charge more slowly than expected
If you missed iOS 13.2.3, you get its fixes with your upgrade. Here's what iOS 13.2.3 brought to the iPhone:
- A fix for an issue where system search and search within Mail, Files, and Notes might not work
- A fix for an issue where photos, links, and other attachments might not display in the Messages details view
- A fix for an issue that could prevent apps from downloading content in the background
- A fix for issues that may prevent Mail from fetching new messages, and fail to include and quote original message content in Exchange accounts
If you skipped iOS 13.2.2, you get its fixes with your iOS 13.4 update. iOS 13.2.2 included several fixes including one for a fairly widespread RAM management issue. Here's the full change log:
- A fix for an issue that could cause apps to quit unexpectedly when running in the background
- A fix for an issue where iPhone may temporarily lose cellular service after a call
- A fix for an issue where cellular data may temporarily not be available
- A fix for an issue that caused replies to S/MIME encrypted email messages between Exchange accounts to be unreadable
- A fix for an issue where using Kerberos single sign-on service in Safari may present an authentication prompt
- A fix for an issue where charging may be interrupted on YubiKey Lightning-powered accessories.
If you skipped iOS 13.2 you get its bug fixes with your iOS 13.4 upgrade. Here's what it fixed:
- A fix for an issue that may prevent passwords from autofilling in 3rd party apps
- A fix for an issue that may prevent the keyboard from appearing when using Search
- A fix for an issue where swipe to go home might not work on iPhone X and later
- A fix for an issue where Messages would only send a single notification when the option to repeat alerts was enabled
- A fix for an issue where Messages may display a phone number instead of a contact name
- A fix for an issue that caused Contacts to launch to the previously opened contact instead of the contact list
- A fix for an issue that may prevent Markup annotations from being saved
- A fix for an issue where saved notes could temporarily disappear
- A fix for an issue where iCloud Backup might not successfully complete after tapping Backup Now in Settings
- Improved performance when using AssistiveTouch to activate App Switcher
If you skipped iOS 13.1.3, you get its fixes with your iOS 13.4 upgrade. These included:
- A fix for an issue that could prevent a device from ringing or vibrating for an incoming call
- A fix for an issue that may prevent opening a meeting invite in Mail
- A fix for an issue where data in the Health app may not display correctly after daylight savings time adjusts
- A fix for an issue where Voice Memos recordings may not download after restoring from iCloud Backup
- A fix for an issue where apps might fail to download when restoring from iCloud Backup
- A fix for an issue that can prevent Apple Watch from pairing successfully
- A fix for an issue where notifications may not be received on Apple Watch
- A fix for issue where Bluetooth may disconnect on certain vehicles
- Improved connection reliability of Bluetooth hearing aids and headsets
- Better launch performance for apps that use Game Center
If you skipped iOS 13.1.2, you get additional bug fixes with your iOS 13.4 update. The bug fixes from iOS 13.1.2 included:
- A fix for a bug where the progress bar for iCloud Backup could continue to show after a successful backup.
- A fix for an issue where Camera may not work.
- A fix for an issue where the flashlight may not activate.
- A fix for a bug that could result in a loss of display calibration data.
- A fix for an issue where shortcuts could not be run from HomePod.
- A fix for an issue where Bluetooth may disconnect on certain vehicles.
If you skipped iOS 13.1.1, its bug fixes are baked into your iOS 13.4 update. The list included:
- A fix for issues that could prevent iPhone restoring from backup.
- A fix for an issue that could cause battery to drain more quickly.
- Fix for an issue that could impact recognition of Siri requests on iPhone 11, iPhone 11 Pro and iPhone 11 Pro Max.
- A fix for a problem where Safari search suggestions may re-enable after turning them off.
- A fix for an issue that could cause Reminders to sync slowly.
If you skipped iOS 13.1, you get its fixes with your iOS 13.4 update.
The iOS 13.1 update brought a long list of bug fixes with it. Here's the full list of changes that were on board:
- A fix for issues in Mail that could cause incorrect download counts, missing senders and subjects, difficulty selecting or flagging threads, duplicate notifications or overlapping fields
- A fix for an issue in Mail that may prevent background downloading of email messages
- A fix for an issue that could prevent Memoji from correctly tracking facial expressions in Messages
- A fix for an issue where photos might not display in the Messages details view
- A fix for an issue in Reminders that prevented some users from sharing iCloud lists
- A fix for an issue in Notes where Exchange notes may not show up in search results
- A fix for an issue in Calendar where birthday events could appear multiple times
- A fix for an issue that could prevent third-party sign in screens from appearing in the Files app
- A fix for an issue that could cause Camera orientation to appear rotated when swiping to it from the Lock screen
- A fix for an issue that could cause the display to sleep while interacting with the Lock screen
- A fix for issues where app icons could appear as blank or as a different app on the Home screen
- A fix for an issue that could prevent supported wallpapers from switching appearances when changing between Light and Dark modes
- A fix for stability issues when signing out of iCloud from Passwords & Accounts in Settings
- A fix for an issue where signing in to update Apple ID settings could fail repeatedly
- A fix for an issue that could prevent the device from vibrating when connecting to a charger
- A fix for an issue that could cause people and groups in the Share Sheet to appear blurred
- A fix for an issue that could prevent alternate words from displaying when tapping on a misspelled word
- A fix for an issue where multilingual typing could stop working
- A fix for an issue that could prevent switching back to the QuickType keyboard after using a third-party keyboard
- A fix for an issue that could prevent the edit menu from appearing when selecting text
- A fix for an issue where Siri may not read Messages in CarPlay
- A fix for an issue that could prevent sending a message using third party messaging apps in CarPlay
New versions of iOS have also been known to fix unlisted issues.
iOS 13.4 could also fix performance issues like severe battery drain, busted Wi-Fi connectivity, UI lag, Bluetooth problems, random reboots, lockups and freezes, and various issues with first-party applications.
If you skipped one of Apple's iOS 12 updates, you will get additional bug fixes with your version of iOS 13.4.
iOS 12.4.1 didn't bring any bug fixes, but iOS 12.4 included a security fix for the Walkie-Talkie app on Apple Watch. It also re-enabled Walkie-Talkie functionality.
Apple's iOS 12.3.1 update brought a fix for an issue that could prevent making or receiving VoLTE calls, a fix for issues in Messages that could cause messages from unknown senders to appear in your conversation list even though Filter Unknown Senders is enabled, and a fix for an issue that could prevent the Report Junk link from appearing in Messages threads from unknown senders.
For more on iOS 12's bug fixes, take a look at our guide.