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I just started seeing this screen appear on my phone. It's an iPhone 6 with iOS 9.1 - factory unlocked - never jailbroken - never done anything even remotely unusual with it. It's obviously a hack of sorts. I didn't press "accept" or "decline" just took a screenshot. There is no "app" visible on the home screen, and nothing running in the background (that I can see).

Can't find anything online that relates as to what this could be, or where it could come from. Very curious to know.

Notes:

  • The back button does not take you anywhere. You just end up on the home screen.
  • I wiped the phone to factory settings, and the screen reappeared while I was still on the "hello/welcome" page.
  • This is not a support question. I 'm curious to know if anybody has heard of this exploit.

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This looks like an App displaying a message of "Please reboot your mobile". Strange that if you tap "< Back" it takes you to the home screen. What app is running in the task switcher? And which version of iOS are you running? – Robotic Cat Nov 2 '15 at 17:44
1  
Found an old post on discussions.apple.com from 2011: discussions.apple.com/thread/3336469?tstart=0 . Could this be a hardware issue? – Robotic Cat Nov 2 '15 at 17:49
    
There is no app running in the task switcher. As mentioned in my question this happened even after erasing the phone and I was in the initial configuration screen. I'm on iOS 9.1 on iPhone 6 – user1197289 Nov 2 '15 at 17:50
    
If the message is being generated by "Springboard" then there could be an internal hardware error in your iPhone. I would contact Apple support and start going through their process (I think you can run a hardware check at some point?) – Robotic Cat Nov 2 '15 at 17:57
1  
Wow. So this isn't an iOS hack but a GSM SIM hack. I knew that SIMs have been targeted in the past but I'd hoped that the network operators had replaced all the old cards and upgraded their systems: en.wikipedia.org/wiki/Subscriber_identity_module . Just out of interest - what is your country and network operator? – Robotic Cat Nov 3 '15 at 23:25

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