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iOS 27 Beta 4 ― Bug Fixes, Changes, and Improvements

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
mactracker said:
You can still inspect the real-time completeness using the Console app on a Mac. Connect your iPhone to a Mac and open the Console app on your Mac. In the sidebar, select your iPhone, start the log streaming, and type fetchPipelineCompleteness in the search bar. Quit and re-open the Settings app on your iPhone. You should see the following message:

Code: 
fetchPipelineCompleteness: display=... days=... percent=…

The percentage is in decimal form, i.e. percent=0.90 means 90% done.
Click to expand...
1784739273434.png

It started showing. I don’t have a Mac yet. Thanks for the advice though
 
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alecgold said:
But your upload is abysmal?!?

Oh, and one more thing, where is the public beta?
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Upload on ANY carrier is abysmal - it’s simply a physics issue. Your phone is not capable of providing a strong enough uplink signal to a tower when it’s more then 500ft away.

Here are the median upload speed stats for the 3 major carriers in the US:
IMG_5236.jpeg


And here is my personal highest recorded upload speed, achieved on DB 2, with a giant cell tower in sight and 0 obstructions between:
IMG_5237.jpeg


Expecting more than 20-40mbps for upload speeds is irrational, and those speeds are not the fault of iOS 27 or this beta in general.
 
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New issues:

iPhone Air - when launching an app from App Manager, getting infrequent pauses for 3-4 seconds before anything actually happens. No specific app but has occurred more frequently on apps that I need to log into like banking. New to this beta. Not seeing this on my iPad.

iPad Pro 11 M4 - have had YouTube (2x) and Prime Video (1x) both crash mid playing of a video. No warning, it just died. Has not occurred on the iPhone.
 
Ethan.Albano said:
Upload on ANY carrier is abysmal - it’s simply a physics issue. Your phone is not capable of providing a strong enough uplink signal to a tower when it’s more then 500ft away.

Here are the median upload speed stats for the 3 major carriers in the US:
View attachment 2647263

And here is my personal highest recorded upload speed, achieved on DB 2, with a giant cell tower in sight and 0 obstructions between:
View attachment 2647264

Expecting more than 20-40mbps for upload speeds is irrational, and those speeds are not the fault of iOS 27 or this beta in general.
Click to expand...
On my iPhone 14 I get 500 down and 100 up. Exactly those numbers. On an iPhone 17 much higher depending on location.
 
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Not happy with the wired CarPlay dropouts in this beta, so going to flash it with the IPSW method and test it some more tomorrow.

Update: reinstalled DB4 with IPSW (still some dropouts) > removed/re-added the car in CarPlay (still some dropouts) > Force restarted the iPhone (still some dropouts) > tried a different cable (still some dropouts). Guess I am out of solutions at this point with DB4, so submitted the feedback to Apple and will be awaiting DB5.

Update 2: It looks like after all my CarPlay issues were caused by some intermittent issues with the Anker USB A to USB C cable. Yesterday I was driving another car fitted with the same cable, which was bought later and used much less, and had zero dropouts during a long drive. So today I plugged this “good” cable into my usual car (which used to have disconnects) and drove for about three hours with zero dropouts. What is strange, however, is that the “bad” cable had no issues working in my car with an iPhone 15 running iOS 26.5.2, yet would be having lots of dropouts with my iPhone 17 and DB4. Is it possible that iOS 27 feeds more data so my “bad” USB 2.0 cable gets “overloaded” and drops the connection, whereas its younger twin manages to handle it? Anyway, I have now ordered a UGREEN USB 3.0 cable, so it should resolve it.
 
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Anyone else on a Verizon MVNO seeing a “Carrier Settings Update Available” message pop up when opening the About page that doesn’t actually update the carrier settings?

It pops up every time, and each time I hit “Update,” but nothing happens. I’m at Verizon 71.5.1
 
St. Germain said:
If it makes you feel better I've had several wireless CarPlay dropouts with B4.
Click to expand...

I know I am not alone 😋, but I have noticed that my CarPlay dropouts got progressively worse as betas advanced. DB3 was the worst so far, so DB4 seemed better in comparison, but still bugged in that department. I have reinstalled DB4 now with IPSW, so will see if it helps. 🤞

Update: reinstalled DB4 with IPSW (still some dropouts) > removed/re-added the car in CarPlay (still some dropouts) > Force restarted the iPhone (still some dropouts) > tried a different cable (still some dropouts). Guess I am out of solutions at this point with DB4, so submitted the feedback to Apple and will be awaiting DB5.

Update 2: It looks like after all my CarPlay issues were caused by some intermittent issues with the Anker USB A to USB C cable. Yesterday I was driving another car fitted with the same cable, which was bought later and used much less, and had zero dropouts during a long drive. So today I plugged this “good” cable into my usual car (which used to have disconnects) and drove for about three hours with zero dropouts. What is strange, however, is that the “bad” cable had no issues working in my car with an iPhone 15 running iOS 26.5.2, yet would be having lots of dropouts with my iPhone 17 and DB4. Is it possible that iOS 27 feeds more data so my “bad” USB 2.0 cable gets “overloaded” and drops the connection, whereas its younger twin manages to handle it? Anyway, I have now ordered a UGREEN USB 3.0 cable, so it should resolve it.
 
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one more said:
I know I am not alone 😋, but I have noticed that my CarPlay dropouts got progressively worse as betas advanced. DB3 was the worst so far, so DB4 seemed better in comparison, but still bugged in that department. I have reinstalled DB4 now with IPSW, so will see if it helps. 🤞
Click to expand...
Have you removed the iPhone from your vehicle's CarPlay list and vice-versa, then started over?
 
Hamsterhjulet said:
Keyboard still flickers for a second whenever Control Center is dismissed with keyboard showing. Happens everywhere throughout iOS.
Click to expand...

Yes, I've had this since 26.0 and reported. They never fixed it and it's extremely annoying. Maybe if more people have this now they will give it more attention.
 
one more said:
I know I am not alone 😋, but I have noticed that my CarPlay dropouts got progressively worse as betas advanced. DB3 was the worst so far, so DB4 seemed better in comparison, but still bugged in that department. I have reinstalled DB4 now with IPSW, so will see if it helps. 🤞
Click to expand...
Do you know how to reinstall using an ipsw? I tried doing it but every time I do so on my M1 Pro mac running Golden Gate, it just says the OS isn’t a valid OS.
 
lucasrant said:
Background sounds have stopped working for me in beta 4. I know they were working on all previous beta as I use this daily. Would anyone here be kind and check in their device if it’s not working for you either?
Id appreciate it!!
Click to expand...
Temporary (?) Workaround (for me, 17P): in Background Settings, toggle on “Use When Media Playing”.
 
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