I had this issue and was able to fix it:

I did an OTA update (iPhone 6, AT&T) and experienced this issue. Touch ID wasn't working and "No Service" on the phone. I tried hard resets and resetting the SIM card, with no success.

I was able to fix the issue by downloading the iOS 8.0.1 ipsw from the developer site, then connecting the phone to iTunes, holding down option while clicking on update, and selecting the 8.0.1 ipsw. Phone redid update through iTunes (not OTA) and when it restarted, all was fixed.

Not sure how non-developers can get the .ipsw file.

Not sure how I would explain how to do this to, say, my mother. Hopefully there is a more sensible/easy fix that comes out soon.

> Not sure how non-developers can get the .ipsw file.

http://www.redmondpie.com/ios-8.0.1-download-links-for-iphon...

straight from the apple CDNs.

Holy shit, they offer IOS 8 for iPad 2! Who are they supporting with this?

iPad 2 was being sold until very recently (March 2014).

https://en.wikipedia.org/wiki/IPad_2

"After the announcement and release of the third generation iPad, the iPad 2, which continued to be available for purchase received a hardware upgrade."

http://www.extremetech.com/computing/178676-apple-kills-the-...

"In a PR statement released earlier today (March 18, 2014), Apple unceremoniously announced the death of the long-lived iPad 2. Apple’s second tablet was released back in March of 2011, and remained a core part of Apple’s line-up until today. "

Dev site still shows 8.0 though?

Edit: Appears to have been pulled.

Seems like it's hitting primarily iPhone 6 users. https://twitter.com/jsnell/status/514830848374214656

I just confirmed that re-applying the 8.0.1 ipsw through iTunes fixes the issue. Sounds like something is wrong with the OTA.

Upgraded, everything works just fine. T-Mobile.

I'm guessing not an iPhone 6 or 6+?

Correct, iPhone 5s.

Anyone with a problem iPhone 6/6+ on 8.0.1 want to dump the apple system log (asl) to see what's going on?

Just upgraded via iTunes (not OTA). No issues whatsoever. iPhone 6 64Gb AT&T.

Apple has now pulled 8.0.1 - There is no option to update on device any longer.

Confirmed here... iPhone 6 with AT&T -> no service.

Good job Apple, good job.

I seruously doubt either of those worked for "some users." Just an impression grab.

Neither is working. Some speculation that it is an OTA issue. AT&T rep told me to try to redo update through iTunes. Requires downloading the .ipsw. I'm giving that a try now. Hopefully they will have a more sensible fix out soon.

This isn't a problem on Android because you never get an update.

One of the reasons I switched to an iPhone. Got tired of blowing money on a new phone to get an OS update.

It's true... so many locked phones are frozen in time. I had to go out of my way to buy a phone that offers OS upgrades over time.

I agree.