"You must change your iPhone unlock passcode within 37 minutes."

[997440]

.....
BTW I have SektionEins' (banned) JB detector app installed and that says everything is as expected.

I don't know if this is true or not; just reporting. If the above mentioned app installs a private certificate as a part of its features, said certificate can be equated with a Profile. From a discussion (started in 2013, continuing through today) at ASC about the passcode prompt :

Just to close a loop here for the record:

I had this occur as well. I don't use Exchange, but I did have a private certificate installed (actually a private CA certificate).

This happened after I installed iOS 8.4.1, and I started a chat session with Apple. They suggested that a Profile had been installed that caused this problem (installing a private certificate is equivalent to installing a profile).
.....

https://discussions.apple.com/message/28753868#message28753868

 

[Gridl0k]

Weirdly my Profiles option has vanished too. So I'm not sure what to do now. AFAIK I have never installed a private cert.

 

[Shirasaki]

I unlocked my iPhone 6 running iOS 9.3.2 yesterday afternoon.
I was prompted to immediately change my passcode to a new 4 digit one. There was no warning.
My original passcode was 6 digits.
My passcode settings are to immediately require a passcode after the screen locks.
I don't have any configuration profiles on my iPhone.
I do not have any indication of a supervised iPhone via apple's mobile device management.
I do not have any microsoft exchange email accounts setup in Mail.

The key question is what triggered this prompt?

Well, for me.
I have at least one configuration profile installed.
I don't have my iPhone being supervised by mobile device management.
I have at least one exchange mail account set up.
I set to "require passcode immediately when unlocking screen".
My passcode is an alphanumeric passcode.
I never see this prompt.

 

[PeteS1963]

Your web activity caused you to be flagged by the government for "suspicious activity".

Apple does this is to give Government a back door to your phone. It's difficult for them to crack a 6 digit passcode, because of Apple's hardware protections (delay after each incorrect passcode).

This only happens if:

1. You have a 6 digit passcode
2. You visit websites that flag you as "suspicious"

This happened to my wife's iPhone. She only has a 4 digit passcode and she lives in the UK. She ignored it, cleared her web cache, and it went away. This was almost 6 months ago. It hasn't returned.

 

[godschoice]

This happened to my wife's iPhone. She only has a 4 digit passcode and she lives in the UK. She ignored it, cleared her web cache, and it went away. This was almost 6 months ago. It hasn't returned.

I received the attached screens on my Jailbroken iPhone (9.3.3)
I called Apple Tech support and they verified that this is NOT a feature of the iOS.
That it is in fact a phishing attempt and NOT to enter my pin into the dialog.

It appeared several times, even after locking the device, but it never reappeared with any message closer to 0 minutes left. It just stopped appearing while I was on the hold waiting for Apple Support.

 

[C DM]

I received the attached screens on my Jailbroken iPhone (9.3.3)
I called Apple Tech support and they verified that this is NOT a feature of the iOS.
That it is in fact a phishing attempt and NOT to enter my pin into the dialog.

It appeared several times, even after locking the device, but it never reappeared with any message closer to 0 minutes left. It just stopped appearing while I was on the hold waiting for Apple Support.

Have they explained how this phishing attempt works? It seems to be coming from and linked to actual internal iOS settings, which no one but Apple could really have access to or do anything with.

 

[agentsmithone]

Exchange requires a passcode for enhanced security for activation. I've seen similar while setting up Exchange email on an iOS device, though in the past I'm fairly sure there wasn't a timed grace period, unless that's new.

 

[iapplelove]

Sorry to dig up an old thread, but I finally got a change passcode message after hearing about others for a year now.

It is rather strange.

 

[Harry110]

Anyone else have this issue continue after clearing cache and history? My countdown is still going. I'll wait to see what happens when it hits zero, but thought I'd ask.

All personal accounts on here. No business. Not jail broken. Have not yet updated to iOS 10. On an iPhone 5s.