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iOS 9.3.1 Bug - Anyone else experiencing this?

Yebubbleman

Yebubbleman

macrumors 603
Original poster
May 20, 2010
6,025
2,617
Los Angeles, CA
On both my iPhone 6s Plus and my cellular iPad mini 4, after a reboot, both devices won't join my WiFi network until AFTER I enter in my passcode for the first time (as TouchID is not supposed to work the for the first unlock after a restart of the OS). Both devices are on Verizon.

Edit: It also happens on my WiFi-only iPad Air 2, but not my sixth generation iPod touch, so maybe it's only on devices with TouchID and/or a passcode enabled?

I know that this wasn't always how these devices behaved and it is happening on more than one of them, so I'm confident that I don't have defective hardware.

Has anyone else experienced this and/or knows more about the issue? I'd imagine that this would be quite bad for anyone on a metered data connection.
 
That is a complete normal behavor since like forever (9.0 at least, but I guess even in 8.x it hass been like so). Maybe only on Touch-ID devices, I cannot check because I actually do not own any non-touchID-devices anymore.

EDIT: I do not think of it as a mayor issue. Really, how often do you actually reboot your decvie? And IF you do, then why do it "unattended" and not just wait for it, then enter PIN hand everything is fine?
 
Yebubbleman said:
On both my iPhone 6s Plus and my cellular iPad mini 4, after a reboot, both devices won't join my WiFi network until AFTER I enter in my passcode for the first time (as TouchID is not supposed to work the for the first unlock after a restart of the OS). Both devices are on Verizon.

Edit: It also happens on my WiFi-only iPad Air 2, but not my sixth generation iPod touch, so maybe it's only on devices with TouchID and/or a passcode enabled?

I know that this wasn't always how these devices behaved and it is happening on more than one of them, so I'm confident that I don't have defective hardware.

Has anyone else experienced this and/or knows more about the issue? I'd imagine that this would be quite bad for anyone on a metered data connection.
Click to expand...

Same "issue" on AT&T but I assumed it was a security feature. I only noticed recently because the 9.3.1 update is killing my battery when the phone is idling and my two phones are shutting off overnight.
 
I think this is completely standard behaviour.

You fully reboot so that Touch ID needs the password, why would it connect to a wifi network until then?? Seems foolish to think it would. And it's certainly not a big deal, it's not like it's asking you to completely reset all settings or anything.
 
This is intended behavior that began in iOS 8 due to their full device encryption features. The OS can't read the saved Wi-Fi networks (or anything else in the keychain for that matter) until it is manually unlocked after a reboot. Another way to test this is to reboot your device, and before unlocking it, have a saved contact call you, and it will only show their number and not their name/info.


This security feature is designed so if you reboot your phone, say in the presence of law enforcement, they are unable to force you to unlock your device via Touch ID, and any and all information on the device sans Medical ID is encrypted until manually unlocked with your passcode.


This has nothing to do with 9.3.1.

Edit... Read the iOS security guide and you will learn about this and much much more.
 
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May be intended but it good for find my iPhone purposes.
 
archvile said:
The OS can't read the saved Wi-Fi networks (or anything else in the keychain for that matter) until it is manually unlocked after a reboot.
Click to expand...

That's not universally true. If may be implemented for wifi, but your phone connects to icloud services immediately after reboot (using cellular data) without unlocking it. icloud credentials are also part of the keychain.
 
archvile said:
This is intended behavior that began in iOS 8 due to their full device encryption features. The OS can't read the saved Wi-Fi networks (or anything else in the keychain for that matter) until it is manually unlocked after a reboot. Another way to test this is to reboot your device, and before unlocking it, have a saved contact call you, and it will only show their number and not their name/info.


This security feature is designed so if you reboot your phone, say in the presence of law enforcement, they are unable to force you to unlock your device via Touch ID, and any and all information on the device sans Medical ID is encrypted until manually unlocked with your passcode.


This has nothing to do with 9.3.1.

Edit... Read the iOS security guide and you will learn about this and much much more.
Click to expand...

Do you have a link to this guide? Would be interested to read it.
 
I can tell you it's been since 8.4 at least, it is present in devices with no touch ID as my children have 4S and iPad mini and when they reboot, those devices doesn't get conncted to wifi.

It happens the same with my iPhone 6s plus and with my wife's iPhone 6 .
 
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