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iOS 12.1.2 Beta 1 ― Bug Fixes, Changes, and Improvements

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macrumors 68040
Original poster
Apr 17, 2017
Cupertino, CA
iOS 12.1.2 Beta 1

Release Date ― December 10, 2018
Build Number ― 16D5024a
Darwin Kernel Version ― 18.2.0: Sun Dec 2 20:53:08 PST 2018; root:xnu-4903.240.8~8/

iOS 12.1.2 Beta 1 Release Notes

New Features & Changes
New Issues

  • Some user interface elements are inaccessible to VoiceOver in the “Electrocardiogram (ECG)” and “Irregular Heart Rhythm Notification” sections in Health > Health Data > Heart
Remaining Issues
  • Mail notifications still broken, at least on secondary email accounts. (Sounds but not banners or badges)
  • Lock screen orientation glitch in the Control Center: If you have screen orientation lock enabled, and then change the state of "Increase Contrast" in Settings, for example enable it, your lock orientation icon will be fully white instead of red. Video: Here
  • Lock screen lock disappears: Swipe on the lockscreen for a few times, after some time, your lock status will disappear. Video: Here. If you happen to reproduce it while your phone is unlocking, you will get something like this, the notifications will get glitched.
  • Some apps like Google Maps and Clash Royale will lag on iPhone X and above: Open the affected app, for example Google Maps. Do not do anything else, just minimize your brightness to the lowest. Now, you will see the app's FPS number has been drastically decreased, try to do circles in the map, you will see it is laggy. To make it smooth again, you can: A) Start screen recording or B) Increase brightness.
  • Folder in Dock bug - swipe to widgets and then back to home screen: it will blink. Video: Here
  • Signal bars not updating on in car infotainment using either Bluetooth or CarPlay unless phone screen is on (XS and XS Max only, since iOS 12.0).
Notification bugs:
  • Grouped notifications glitch - Expand, collapse and then expand again a grouped notification quickly, it will have a glitchy animation with DND. Video: Here
  • Notification Center bug: If you have a grouped notification in the notification center, make sure to delete till you have only one, then click the X next to the app and not the one next to "Notification Center". It will result in a glitch - Video: Here
  • Notification center missing background: Lock and unlock your phone. Then open an app, and quickly pull down the notification center. It won't have background for a few seconds.
  • If you have enough notifications to hide the time, then scroll down-up few times, the notifications will get glitched with the time. After you collapse the notifications, there will be a glitchy animation. Video: Here
  • On an iPhone X, XS, and XS Max, if your home screen have multiple pages, go to a different page other than main, then swipe up to get to your main page. After you quickly want to open anything in the Dock, you can't, you need to wait a few seconds to be able to do it. Video: Here
  • Lock screen time & lock status glitch: using your locked iPhone, swipe from right to left two times quickly. For the second swipe, your time and lock status will disappear. Video: Here
  • Landscape mode control center bug: Open anything in landscape mode, for example a YouTube video in full screen. Open your Control Center, swipe from right to left, then close CC. There will be a stuck bar at the top of your screen for a few seconds. Video: Here
  • App crash bug: Open the app switcher. Tap on an app, swipe it up to close, but while its closing tap on it - > glitchy crash. Video: Here
  • Adding the first widget in the available widgets list will have a glitchy animation. Video: Here
  • Safari: "add to home screen" - when there is just one home screen, it does not show the recently added icon. It does create a 2nd home screen page but when you swipe left the icon is missing. After a reboot or waiting for several minutes, the icon may appear.
  • Since iOS 11.4 still can’t initiate ‘album’ playback via Siri on the watch with music that is locally stored on phone.
  • When iCloud Keychain and text replacements are enabled, text replacement won’t be offered anymore when trying to login. The specific text replacement is overwritten with “Password”.
  • iMessage app sort order resets after a period of time from custom order to default order.
  • In Messages: using 3D Touch to Peak and Pop, or when rotating the screen orientation turns the iMessage app strip black (iPhone 7 only)
  • Sometimes, if you have no SIM inserted, you will see an old time to appear at the top of the screen. Video: Here
  • Opening app switcher in landscape mode will sometimes show old stuff that you did with the app before. Video: Here
  • On the home screen, scrolling to the second page, swiping up then holding the screen will cause the second page to disappear. Video: Here
  • Lockscreen blocking bug: Get to the passcode request page, then swipe up and down while not releasing the screen - this will cause the first line (1, 2, 3) to be unresponsive. Video: Here (I typed 1 to show that it was working)
Resolved Issues
  • Audio performance when using some third-party apps is improved on iPad Pro 12.9-inch (3rd generation) and iPad Pro 11-inch

  • Fixes an issue with the brightness jumping up and down around 15% on XS Max (maybe on XS too) when True Tone or Night Shift are enabled (see
  • Fixes the pictures scrolling in the info section of contact info in Message app
Additional Notes
  • If you experience Setting crashes, it may be due to removal of stock apps.
OTA Update Sizes

  • iPhone XR 2.61 GB
  • iPhone XS 2.83 GB

  • Intel iPhone XR/XS/Max: 1.03.02
  • Qualcomm iPhone 8/8 Plus/X: 3.31.00
  • Qualcomm iPad Pro 9.7: 5.32.00
  • Intel iPhone 8/8 Plus/X: 2.02.01
  • Qualcomm iPhone 7/7 Plus: 5.21.00
  • Intel iPhone 7/7 Plus: 3.02.00
  • iPhone 6/6 Plus/SE: 7.31.00
  • iPhone 6S/6S Plus: 5.30.00
  • iPhone 5S: 10.30.00
United States
  • Verizon - 34.5.5
  • Visible (MVNO Verizon) 34.0
  • Verizon (iPad) - 35.0
  • T-Mobile - 35.0
  • T-Mobile (iPad) - 34.5
  • AT&T - 34.5.2
  • MetroPCS -
  • U.S. Cellular - 32.5.9
  • Sprint - 35.0
  • TracFone/Straight Talk/Walmart Family Mobile - 34.5
  • Xfinity Mobile 35.0
United Kingdom
  • O2-UK - 34.0
  • BT-UK MVNO on EE- 34.5.1
  • Three - 32.5.8
  • EE - 34.5.1
  • Vodafone UK - 35.0
  • Virgin Mobile MVNO on EE- 34.0
  • Orange B - 32.5.7
  • BASE - 33.0
  • Videotron -
  • Rogers - 34.0
  • Fido - 35.0
  • Bell - 35.0
  • Telus - 32.5.12
  • Freedom Mobile - 34.0
  • Orange France - 31.5.1
  • Orange Morocco - 31.5
  • O2-DE -
  • - 34.0.1
  • - 31.5.3
  • KPN -
Southeast Asia
  • Singapore Singtel -
  • Philippines Globe - 34.0
  • Philippines Globe (iPad) - 34.0
  • Philippines Smart - 31.5
  • Thailand AIS -
  • Malaysia Umobile - 33.0
  • Malaysia Maxis -33.0
  • Malaysia Digi -
  • Malaysia celcom -
  • Hong Kong - 32.0
  • Comviq -
  • Tre - 31.0
  • Salt - 34.5
  • Eir - 33.5
  • Optus - 32.0
  • Telstra - 34.5
  • Turkcell (Lifecell) - 32.0
  • Vodafone TR - 32.0
  • Turk Telekom - 32.0
  • T-Mobile -
  • Orange - 32.0
  • Play - 31.0
  • Airtel - 35.0
  • Jio - 34.5
  • Jio (iPad) - 34.0
  • Mexico - Telcel - 35.0
  • TIGO GT -34.0
  • Docomo - 32.5.10
  • AlwaysOnline -
Last edited:


macrumors 65816
Oct 20, 2011
3xxMB here on my XS, coming from 12.1.1 B3 though.


macrumors 6502a
Sep 19, 2014
Anyone know what the D stand for?

Noticed it went from 16C5050 to 16D5024


macrumors 6502a
Jan 12, 2011
Weird that they wouldn't be working on 12.2 at this point

I’m sure they’re working on it, just not ready for us to get our hands on it just yet. With this beta coming out today, I’d guess we won’t see 12.2 betas until after the holidays.


macrumors 603
Jun 21, 2013
Pretty much a snoozer to have 2 x.x.x releases in a row. Hopefully, there will be some goodies in the x.x releases to come.
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macrumors G3
Apr 27, 2015
Philadelphia, PA
Course they are working on it.

Sure, just don't see the point in pushing fixes to another point update when you could wrap them into 12.2.
I’m sure they’re working on it, just not ready for us to get our hands on it just yet. With this beta coming out today, I’d guess we won’t see 12.2 betas until after the holidays.

My guess would be March
They probably are, just not in beta yet.

Yup, I get that - my wording wasn't great. I just don't see the reason for a bunch of point updates.
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macrumors regular
Feb 22, 2016
Montreal, QC, Canada
Someone has AW saying watchOS 5.1.2 Developer Beta 2???

It's because you are on the release version of 5.1.2... the dev beta has a higher version number than the release one (16S46 for the release and 16S5046a for the dev one)

edit: you should see it by now. just wait a bit more if it still doesn't show up


macrumors member
Oct 6, 2015
It's because you are on the release version of 5.1.2... the dev beta has a higher version number than the release one (16S46 for the release and 16S5046a for the dev one)

edit: you should see it by now. just wait a bit more if it still doesn't show up
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