Update: Apple released iOS 8.0.2 Thursday to fix the major bugs introduced by iOS 8.0.1. 

Do not—I repeat, DO NOT—update your iPhone to iOS 8.0.1. Not yet, anyway, at least if you want to actually want cellular reception or Touch ID to work.

See also: Think iOS 8 Crashes A Lot? You’re Not Imagining Things

To fix its flub in HealthKit, Apple pushed out an incremental update to iOS 8, the latest version of its operating software for iPhones and iPads, just a week after making iOS 8 available to the public. That small update, however, led to a huge problem: It broke some core features, especially for the new set of iPhones.

See also: Why You Can’t Download Health And Fitness Apps From Apple’s App Store

Sites like TechCrunch and The Next Web report that people have been seeing 8.0.1 hobble their iPhone 6 and 6 Plus devices. Indeed, we’re spotting trouble across the Web as well:

Some users with older iPhones, like the 5 and 5S, don’t seem to be affected, at least not en masse like iPhone 6 owners. So the bug could be particularly acute for Apple’s latest phones. 

See also: Apple’s HealthKit Is Looking Unhealthy

The software update was intended to fix the unexplained bug that Apple said was plaguing HealthKit, its new fitness and health monitoring system. Third-party apps written to work with HealthKit found themselves yanked from the App Store as Apple attempted to repair the issues.

The iOS update also tackled other problems, such as downloaded keyboards that wouldn’t stay selected as default options; some photos that wouldn’t show up in Photo Library; errant data use with SMS or MMS; and in-app purchase glitches in Family Sharing. 

iOS 8.0.1 was supposed to address all of the following issues, according to Apple: 

  • Fixes a bug so HealthKit apps can now be made available on the App Store
  • Addresses an issue where 3rd party keyboards could become deselected when a user enters their passcode
  • Fixes an issue that prevented some apps from accessing photos from the Photo Library
  • Improves the reliability of the Reachability feature on iPhone 6 and iPhone 6 Plus
  • Fixes an issue that could cause unexpected cellular data usage when receiving SMS/MMS messages
  • Better support of Ask To Buy for Family Sharing for In-App Purchases
  • Fixes an issue where ringtones were sometimes not restored from iCloud backups
  • Fixes a bug that prevented uploading photos and videos from Safari 

For more information on the security content of this update, please visit this website http://support.apple.com/kb/ht1222

Those sound great, or at least they would have, if other phone-killing glitches weren’t on board. Unfortunately, they are. So again, the major takeaway is this: 

Do not install this software update until Apple fixes this version. Tell your friends. 

We’ll give you the all-clear when the new version is ready. (Updated 9/25/2014: The new version is ready. See the second update below.)

Update: Apple appears to have already yanked iOS 8.0.1:

9to5Mac reports that Apple pulled this software update for now, and it seems that the company has indeed withdrawn its digital signature for iOS 8.0.1. Unfortunately, that doesn’t help users who already grabbed it. But all may not be lost for them. 

Some folks say that restoring their iPhones successfully reverts the device back to the previous version. 

See also: How To Roll Back iOS 8.0.1

Update 2: Apple has released iOS 8.0.2 to fix what it broke in iOS 8.0.1. For more info, click here

If you were afflicted and try this, let us know how it works out for you in the comments below. 

Photo by Tomás Fano