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iOS 26.6 Beta 4 ― Bug Fixes, Changes, and Improvements

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Banglazed

Banglazed

macrumors 603
Original poster

iOS 26.6 Beta 4​

Release Date ― July 6, 2026
Build Number ― 23G5057c
Darwin Kernel Version ―

iOS 26.6 Beta 4 Release Notes

New Issues
Remaining Issues
Resolved Issues
Features
Additional Notes
  • iPhone 17 series: 1.70.01
  • iPhone Air: 2.05.04
  • iPhone 16 series: 2.70.01
  • iPhone 16e: 2.02.03
  • iPhone 15 series: 3.50.08
  • iPhone 14 series: 4.51.04
  • iPhone 13 series and iPhone SE (3rd gen): 5.51.02
  • 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 - 70.0
Belgium
  • BASE - 33.0
  • Orange B - 58
  • Proximus - 45.0
  • Telenet - 66.0
Brazil (info updated 26.6b1, last change in 26.5RC)
  • Claro Brasil - 70.0
  • Vivo - 70.0
  • 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 - 70.0
  • Telus - 54.8.8
  • Videotron - 53.0
  • Virgin Mobile - 50.0
Denmark
  • 3 DK - 46.7.11
  • TDC 69.5
  • Norlys 69.5
Finland
  • DNA - 58.5.7
France
  • Bouygues Telecom - 40.0
  • Orange France - 70.0
  • Free - 70.0
  • SFR -
Germany
  • Vodafone.de - 70.0 and RCS enabled
  • Telekom.de - 70.1 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 - 69.0 (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 - 70.0
  • Vodafone NL - 68.0
  • Odido - 68.0
Poland
  • T-Mobile - 64.5.4
  • Orange - 70.0
  • 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 - 70.0
  • Philippines Globe (iPad) - 38.0
  • Philippines Smart - 70.0
  • 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 - 70.0
  • DIGI ES - 54.8.4
  • Vodafone ES - 54.8.8
  • Movistar - 70.0
  • Yoigo - 70.0
Sweden
  • Comviq -
  • Tre - 31.0
Switzerland
  • Salt - 58.0
  • Sunrise - 70.0
  • Swisscom - 70.0
Turkey
  • Turkcell (Lifecell) - 36.5.5
  • Vodafone TR - 32.0
  • Turk Telekom - 32.0
United Kingdom
  • BT-UK (EE MVNO) -
  • EE - 70.0
  • Giffgaff (O2 MVNO) -
  • iD Mobile (Three MVNO) - 70
  • Lebara (Vodafone MVNO) - 67.5.1
  • Lyca (EE MVNO) -
  • Mozillion (EE MVNO) - 67.0
  • O2-UK - 69.5.2
  • Sky (O2 MVNO) - 69.5.1
  • Three - 69.0
  • Virgin Mobile (O2 MVNO) -
  • Vodafone UK - 64.5.5
  • Smarty (Three MVNO) - v70.0
United States
  • AT&T - 70.01
  • Boost - 57.0
  • Cricket - 60.5.5
  • FirstNet - 55.0
  • FirstNet (iPad) - 41.7.6
  • Metro (TMO MVNO) - 70.0
  • Spectrum (VZW MVNO) - 70.0
  • T-Mobile - 70.0
  • TracFone/Straight Talk/Walmart Family Mobile - 63.5
  • U.S. Cellular - 46.7.24
  • Ultra/Mint Mobile (TMO MVNO) - 64.5.16
  • Verizon - 70.0
  • Visible (VZW MVNO) - 70.0
  • 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:
  • Like
Reactions: BBDDVV and James6s
iPhone 16 Pro here. I’m not really a beta tester, but iOS 26.5 was driving me nuts with overheating which came out of nowhere after 1 month working fine, so I’ve been through this 26.6 betas.

iOS 26.6 beta 2 was fine, running much cooler than iOS 26.5 on my iPhone. Battery was fine getting 8+ SOT no problem.

iOS 26.6 beta 3 brought back the overheat.

Luckily iOS 26.6 beta 4 seems back to normal working temperatures for now just as beta 2

Though all 26.6 betas have been running smoothly overall.

Now I am hoping for a 26.6(.2?) fully stable release so I can leave my iPhone rest for a little until 27.2 or later comes out, just the same way I did with iOS 18.6.2 which I kept until I updated to iOS 26.4 due to that scary security issue.
 
  • Like
Reactions: roncron and Hey Thomas
After almost a day:
- it's quite speedy and smooth with minor stutters and lags here and there, like every 26.6 betas,
- battery life still trash, at this point they'll never bring back the battery life of iOS 26.3,
- in beta 2 thread I've written that I haven't had any CarPlay disconnects issues, beta 3 brought them back, so I'll see if it's still happening in beta 4. Today it hasn't happened,
- not a single graphical bug I'm seeing since 26.3 is fixed. 100% sure they'll not fix them, they're focusing on iOS 27.

Also I don't care that much about benchmarks but if someone's interested here's from top to bottom geekbench results: beta 4, beta 3 and beta 2
IMG_0565.jpg
 
  • Like
Reactions: roncron
Update regarding beta 4 and CarPlay: seems like it's the same as in beta 2 - it hasn't disconnected and reconnected itself yet.

Sometimes when I unlock the phone, the swipe up animation stops in the middle for like a half a second. It happened maybe 5 times since updating to beta 4.

Battery life is unfortunately atrocious, the worst one I've ever had on this phone.
 
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Reactions: lindros2
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