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iOS 26.3 ― Bug Fixes, Changes, and Improvements

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Banglazed

Banglazed

macrumors 603
Original poster

iOS 26.3​

Release Date ― February 11, 2026
Build Number ― 23D127
Darwin Kernel Version ― 25.3.0: Mon Jan 26 21:00:04 PST 2026; root:xnu-12377.82.2~2

This update provides important bug fixes and security updates.

iOS 26.3 Beta Release Notes

New Issues
Remaining Issues
Resolved Issues
Features
Additional Notes
  • iPhone 17 series: 1.40.03
  • iPhone Air: 2.02.03
  • iPhone 16 series: 2.40.01
  • iPhone 16e: 2.02.03
  • iPhone 15 series: 3.40.01
  • iPhone 14 series: 4.40.01
  • iPhone 13 series and iPhone SE (3rd gen): 5.40.01
  • iPhone 12 series: 5.10.01
  • iPhone 11 series, iPhone SE (2nd gen) and iPad Air (Cellular, 4th gen): 6.50.00
Australia
  • Optus - 64.5.8
  • Telstra - 64.5.13
  • Vodafone AU - 66.5.1
Belgium
  • BASE - 33.0
  • Orange B - 58
  • Proximus - 45.0
  • Telenet - 66.0
Brazil (info updated 26.3, last change in 26.3b3)
  • Claro Brasil - 68.0
  • Vivo - 68.0
  • TIM -
  • Oi - declared bankrupt in Nov 10th 2025
Canada
  • Bell - 62.8
  • Fido - 56.0
  • Fizz - 53.0
  • Freedom/Shaw Mobile - 54.8.6
  • Mint Mobile - 58.0
  • Public Mobile - 54.8.4
  • Rogers - 68.0
  • Telus - 54.8.8
  • Videotron - 53.0
  • Virgin Mobile - 50.0
Denmark
  • 3 DK - 46.7.11
  • TDC 68.0
  • Norlys 68.0
Finland
  • DNA - 58.5.7
France
  • Bouygues Telecom - 40.0
  • Orange France - 63.0
  • Free - 68.0
  • SFR -
Germany
  • Vodafone.de - 66.5.2 and RCS enabled
  • Telekom.de - 67.5.3 and RCS enabled
  • o2-de - 61.6.1 RCS enabled
Greece:
  • Cosmote - 38.0
Guatemala
  • TIGO GT - 49.0
India
  • Airtel - 58.5.18
  • Jio - 58.5.18 (iPhone) and 58.5.18 (iPad)
  • Vi India (Vodafone Idea) - 58.5
Ireland
  • Eir - 33.5
  • Vodafone IE - 38.0
Mexico
  • AT&T - 57.0
  • Telcel - 57.6
Morocco
  • Orange - 50.0
Netherlands
  • KPN - 61.0
  • Vodafone NL - 45.0
  • Odido -
Poland
  • T-Mobile - 64.5.4
  • Orange - 64.5.2
  • Play - 61.0
  • Plus - 61.0
Portugal
  • Vodafone P - 40.0
Romania
  • Orange RO - 55.0
Slovakia
  • Orange SK - 57.6
Southeast Asia
  • Singapore Singtel -
  • Philippines Globe - 68.0
  • Philippines Globe (iPad) - 38.0
  • Philippines Smart - 68.0
  • Thailand AIS - 53.0
  • Thailand DTAC - 53.0
  • Malaysia Umobile - 33.0
  • Malaysia Maxis -33.0
  • Malaysia Digi -
  • Malaysia celcom -
  • Hong Kong - 32.0
  • Taiwan -
Spain
  • Orange ES - 68.0
  • DIGI ES - 54.8.4
  • Vodafone ES - 54.8.8
  • Movistar - 67.5.1
  • Yoigo - 68.0
Sweden
  • Comviq -
  • Tre - 31.0
Switzerland
  • Salt - 58.0
  • Sunrise - 68.0
  • Swisscom - 68.0
Turkey
  • Turkcell (Lifecell) - 36.5.5
  • Vodafone TR - 32.0
  • Turk Telekom - 32.0
United Kingdom
  • BT-UK (EE MVNO) -
  • EE - 67.5.1
  • Giffgaff (O2 MVNO) -
  • iD Mobile (Three MVNO) - 68.0
  • Lebara (Vodafone MVNO) - 67.5.1
  • Lyca (EE MVNO) -
  • Mozillion (EE MVNO) - 67.0
  • O2-UK - 68.0
  • Sky (O2 MVNO) - 68.0
  • Three - 68.0
  • Virgin Mobile (O2 MVNO) -
  • Vodafone UK - 64.5.5
United States
  • AT&T - 68.0
  • Boost - 57.0
  • Cricket - 60.5.5
  • FirstNet - 55.0
  • FirstNet (iPad) - 41.7.6
  • Metro (TMO MVNO) - 68.0
  • Spectrum (VZW MVNO) - 68.0
  • T-Mobile - 68.0
  • TracFone/Straight Talk/Walmart Family Mobile - 63.5
  • U.S. Cellular - 46.7.24
  • Ultra/Mint Mobile (TMO MVNO) - 64.5.16
  • Verizon - 68.0
  • Visible (VZW MVNO) - 68.0
  • Xfinity Mobile - 67.5.1
Other
  • Docomo - 32.5.10
  • AlwaysOnline -

Historical beta release chart

iOS Version History Chart

iOS version history chart
www.thinkybits.com www.thinkybits.com
 
Last edited:
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iOS 26.3 has been solid for me all the way through beta on my iPhone 16 Pro. Just a bit disappointed that every visual glitch I've reported is still present. Had hoped Apple would have focused fixing glitches before iOS 26.4 which will focus on the new Siri. I assume fixing existing visual bugs will be down prioritized until iOS 27 by now..
 
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didnt have anything issues with 26.2.1 apart from lag and ui issues on iPhone 17 pro and m4 iPad Pro and the 26.3 betas didnt fix any of them
 
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Hamsterhjulet said:
iOS 26.3 has been solid for me alle the way through beta on my iPhone 16 Pro. Just a bit disappointed that every visual glitch I've reported is still present. Had hoped Apple would have focused fixing glitches before iOS 26.4 which will focus on the new Siri. I assume fixing existing visual bugs will be down prioritized.
Click to expand...
I would assume that iOS 27 will focus on the visual issues. Apple have enough to manage with the new Siri. Come September we should be in a better place.
 
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Reactions: iModFrenzy, Faerlina, Cape Dave and 1 other person
Keyboard still suggests nonsense words unless I type super slow.

IMG_2779.jpeg
 
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Hans300 said:
So 2 builds newer than RC
Click to expand...
I am curious. The build number after the letter (D in this case) continues from previous versions? Or is it reset after each release?

For instance, iOS 26.2 is build number 23C56, while iOS 26.3 is build number 23D127… what does this mean? It’s the #127 build of iOS 26, or has iOS 26.3 had more iterations than iOS 26.2?
 
Populus said:
I am curious. The build number after the letter (D in this case) continues from previous versions? Or is it reset after each release?

For instance, iOS 26.2 is build number 23C56, while iOS 26.3 is build number 23D127… what does this mean? It’s the #127 build of iOS 26, or has iOS 26.3 had more iterations than iOS 26.2?
Click to expand...

The letter indicates the kernel and with that also the minor version of the OS.
iOS 26 is using Darwin Kernel Version 25.x

26.0.x is build 23Axxx (Darwin Kernel Version 25.0)
26.1.x is build 23Bxxx (Darwin Kernel Version 25.1)
26.2.x is build 23Cxxx (Darwin Kernel Version 25.2)
26.3.x is build 23Dxxx (Darwin Kernel Version 25.3)

So with every minor version change, there is a new kernel minor version and thus a new letter.
26.4 will be build 23Exxx with Darwin Kernel Version 25.4.

The number after the letter then „restarts“ with every new letter = new kernel minor version (like Darwin Kernel Version 25.0 to 25.1).
So in theory there was a build 23D1, but most likely not due to pre-builds, alpha builds like 23D3000 an 4000 builds, betas that are in the 5000 range etc.).

Within fix releases (like 26.2.1), the letter does usually not change (as usually the kernel minor version does not change - yes I know there were exceptions back in iOS 12 I guess) and thus the number after the letter just increases within fix releases.

Hope that helps a bit 🙂
 
Last edited:
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This feels leaps and bounds better than 26.2.1 on the iPhone 17! Annoying visual stutters here and there are gone, fluidity is buttery smooth and it feels lightning fast opening apps, loading content, swiping, scrolling, safari etc etc. battery life tbc

Finally! Nice one Apple 👌🏻
 
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James6s said:
This feels leaps and bounds better than 26.2.1 on the iPhone 17! Annoying visual stutters here and there are gone, fluidity is buttery smooth and it feels lightning fast opening apps, loading content, swiping, scrolling, safari etc etc. battery life tbc

Finally! Nice one Apple 👌🏻
Click to expand...
Not perfect but it’s pretty smooth overall, still more optimization needed.
 
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Kylo83 said:
didnt have anything issues with 26.2.1 apart from lag and ui issues on iPhone 17 pro and m4 iPad Pro and the 26.3 betas didnt fix any of them
Click to expand...
My biggest annoyance with 26.2.1 was the constant app reloading, and battery life took a big hit ever since I updated to 26.2 from 18.6.3. And this strange blank keyboard that has happened twice, both times it happened when it prompted me to enter passcode. Never looked forward to an update like to 26.3 before.

26keyboard.jpg
 
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