Apple Releases iOS and iPadOS 13.3.1 With Toggle for Turning Off U1 Chip in Latest iPhones

Apple today released iOS and iPadOS 13.3.1, minor updates to the iOS 13 operating system. iOS and iPadOS 13.3.1 come over a month after the release of iOS/iPadOS 13.3, which brought Communication Limits for Screen Time.

The iOS and iPadOS 13.3.1 updates are available on all eligible devices over-the-air in the Settings app. To access the updates, go to Settings > General > Software Update. Apple has also released an iOS 12.4.5 update for older devices.

ryanscoolios13thumbnail
iOS 13.3.1 includes a "Networking & Wireless" toggle that turns off the U1 Ultra Wideband chip in the latest iPhones. The feature, located in the Privacy > Location Services section of the Settings app, turns off location for Bluetooth, Wi-Fi, and Ultra Wideband.

Apple added this location toggle after it was discovered that the iPhone 11, 11 Pro, and 11 Pro Max continue to track user location even when location services options are disabled. This is because there are international regulatory requirements that mandate the U1 chip be disabled in certain locations.

The new toggle makes sure location tracking is off for the U1 chip at all times. Apple has also added a new "Play Again" button when replaying content that you've already watched in the TV app. The update also includes multiple bug fixes for issues that include a Communication Limits bug that allowed it to be bypassed, a problem with Mail that could prevent images from loading, an issue that could case push notifications to fail to be delivered, and more. Apple's full release notes for the update are below:

iOS 13.3.1 includes bug fixes and improvements. This update:
- Fixes an issue in Communication Limits that could allow a contact to be added without entering the Screen Time passcode
- Adds a setting to control the use of location services by the U1 Ultra Wideband chip
- Addresses an issue that could cause a momentary delay before editing a Deep Fusion photo taken on iPhone 11 or iPhone 11 Pro
- Resolves an issue with Mail that could cause remote images to load even when the “Load Remote Images” setting is disabled
- Fixes an issue that could cause multiple undo dialogs to appear in Mail
- Addresses an issue where FaceTime could use the rear facing ultra-wide camera instead of the wide camera
- Resolves an issue where push notifications could fail to be delivered over Wi-Fi
- Addresses a CarPlay issue that could cause distorted sound when making phone calls in certain vehicles
- Introduces support for Indian English Siri voices for HomePod

Apple also has separate release notes for iPadOS 13.3.1:

iPadOS 13.3.1 includes bug fixes and improvements. This update:
- Fixes an issue in Communication Limits that could allow a contact to be added without entering the Screen Time passcode
- Addresses an issue with Mail that could cause remote images to load even when the “Load Remote Images” setting is disabled
- Fixes an issue that could cause multiple undo dialogs to appear in Mail
- Resolves an issue where push notifications could fail to be delivered over Wi-Fi
- Introduces support for Indian English Siri voices for HomePod

For more on the new features that Apple added to iOS with the launch of ‌iOS 13‌, make sure to check out our iOS 13 roundup.

Related Forum: iOS 13

Popular Stories

Apple iPhone 16e Feature

Apple Announces iPhone 16e With A18 Chip and Apple Intelligence, Pricing Starts at $599

Wednesday February 19, 2025 8:02 am PST by
Apple today introduced the iPhone 16e, its newest entry-level smartphone. The device succeeds the third-generation iPhone SE, which has now been discontinued. The iPhone 16e features a larger 6.1-inch OLED display, up from a 4.7-inch LCD on the iPhone SE. The display has a notch for Face ID, and this means that Apple no longer sells any iPhones with a Touch ID fingerprint button, marking the ...
iphone 17 pro asherdipps

iPhone 17 Pro Models Rumored to Feature Aluminum Frame Instead of Titanium Frame

Tuesday February 18, 2025 12:02 pm PST by
Over the years, Apple has switched from an aluminum frame to a stainless steel frame to a titanium frame for its highest-end iPhones. And now, it has been rumored that Apple will go back to using aluminum for three out of four iPhone 17 models. In an investor note with research firm GF Securities, obtained by MacRumors this week, Apple supply chain analyst Jeff Pu said the iPhone 17, iPhone...
apple launch feb 2025 alt

Here Are the New Apple Products We're Still Expecting This Spring

Thursday February 20, 2025 5:06 am PST by
Now that Apple has announced its new more affordable iPhone 16e, our thoughts turn to what else we are expecting from the company this spring. There are three product categories that we are definitely expecting to get upgraded before spring has ended. Keep reading to learn what they are. If we're lucky, Apple might make a surprise announcement about a completely new product category. M4...
Generic iOS 18

Here's When Apple Will Release iOS 18.4

Wednesday February 19, 2025 11:38 am PST by
Following the launch of the iPhone 16e, Apple updated its iOS 18, iPadOS 18, and macOS Sequoia pages to give a narrower timeline on when the next updates are set to launch. All three pages now state that new Apple Intelligence features and languages will launch in early April, an update from the more broader April timeframe that Apple provided before. The next major point updates will be iOS ...
apple launch feb 2025

Tim Cook Teases an 'Apple Launch' Next Wednesday

Thursday February 13, 2025 8:07 am PST by
In a social media post today, Apple CEO Tim Cook teased an upcoming "launch" of some kind scheduled for Wednesday, February 19. "Get ready to meet the newest member of the family," he said, with an #AppleLaunch hashtag. The post includes a short video with an animated Apple logo inside a circle. Cook did not provide an exact time for the launch, or share any other specific details, so...
apple c1

Apple Unveils 'C1' as First Custom Cellular Modem

Wednesday February 19, 2025 8:08 am PST by
Apple today announced its first custom cellular modem with the name "C1," debuting in the all-new iPhone 16e. The new modem contributes to the iPhone 16e's power efficiency, giving it the longest battery life of any iPhone with a 6.1-inch display, such as the iPhone 15 and iPhone 16. Expanding the benefits of Apple silicon, C1 is the first modem designed by Apple and the most...
Apple Northbrook

Apple Store Permanently Closing at Struggling Mall in Chicago Area

Tuesday February 18, 2025 8:46 pm PST by
Apple is permanently closing its retail store at the Northbrook Court shopping mall in the Chicago area. The company confirmed the upcoming closure today in a statement, but it has yet to provide a closing date for the location. Apple Northbrook opened in 2005, and the store moved to a larger space in the mall in 2017. Apple confirmed that affected employees will continue to work for the...

Top Rated Comments

drlunanerd Avatar
66 months ago
In the UK we get an extra bug fix!

iOS 13.3.1 includes bug fixes and improvements. This update:

* Fixes an issue where O2 customers could experience intermittent network connectivity

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222
Score: 6 Votes (Like | Disagree)
wgaller Avatar
66 months ago
watch OS 6,1,2 as well.
Score: 5 Votes (Like | Disagree)
lkrupp Avatar
66 months ago

not seeing it
Apple is withholding it just from you.
Score: 5 Votes (Like | Disagree)
Morod Avatar
66 months ago
Also released today by Apple is iOS 12.4.5 for older iPads and other iToys. Thanks Apple!
Score: 4 Votes (Like | Disagree)
1204932 Avatar
66 months ago
Nice, but hopefully there's a lot more fixes than what's listed here :oops:
Score: 4 Votes (Like | Disagree)
zorinlynx Avatar
66 months ago

Also released today by Apple is iOS 12.4.5 for older iPads and other iToys. Thanks Apple!
This makes me very happy, because my mother, who uses an iPhone 6, was concerned that it wasn't going to be getting updates once iOS 13 came out.

Turns out it's still getting updates so she's going to stay secure with her old phone that she's still 100% happy with.

Go Apple!


Seems like its been a long time since an update has been posted, or is it just me?
Holiday season! iOS developers need time off too!
Score: 4 Votes (Like | Disagree)