Apple quietly introduced code into iOS 18.1 which reboots the device if it has not been unlocked for a period of time, reverting it to a state which improves the security of iPhones overall and is making it harder for police to break into the devices, according to multiple iPhone security experts.

On Thursday, 404 Media reported that law enforcement officials were freaking out that iPhones which had been stored for examination were mysteriously rebooting themselves. At the time the cause was unclear, with the officials only able to speculate why they were being locked out of the devices. Now a day later, the potential reason why is coming into view.

“Apple indeed added a feature called ‘inactivity reboot’ in iOS 18.1.,” Dr.-Ing. Jiska Classen, a research group leader at the Hasso Plattner Institute, tweeted after 404 Media published on Thursday along with screenshots that they presented as the relevant pieces of code.

      • herrvogel@lemmy.world
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        2 months ago

        You joke but people do that. I’ve seen people repurpose their old android phones to host small services on their home networks. I won’t comment on how reasonable it is because battery, but it’s a thing.

        • BaroqueInMind@lemmy.one
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          2 months ago

          Literally no difference between a low power SOC RaspberryPi or a fucking phone which is the same thing with a built-in display.

          • Aceticon@lemmy.world
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            2 months ago

            Except the price, which is much lower for the SBC, way much lower if one uses one of the lower end Orange Pi or Banana Pi SBCs.

            Also you can put Linux on the SBCs (which always come unlocked) hence do way more with them as servers than if one has to use Android as the OS.

            I mean, I can get it if people with the technical chops, love for technical challenges and an old and pretty much worthless Android phone, configure it as a server if only because “why not?!”, but it’s not exactly a great option considering that a 40 bucks SBC can do the same, only better, more easily and with far more possibilities (given that it will be running Linux rather than Android).

            PS: Actually somebody below mention mobile network connection, which, thinking about it, would be a good reason to use an old Android phone as a server since it has built-in support for 3G (unless it’s quite old) whilst the SBC needs it add to it which might be a problem for the cheaper SBCs (just wondering about how I would get around to do it, I think you need to connect a USB dongle to it and it has to be something compatible with Armbian Linux)

            • __matthew__@lemmy.world
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              2 months ago

              When you consider the price of a used android (ie. Oneplus 6T for $80 on ebay) and compare it spec for spec with a raspberry pi, it’s actually a really good deal. Like you get:

              • Built in backup power supply (battery)
              • 8-core power-efficient CPU (SDM845)
              • Embedded sensors (microphone, magnetometer, gyro)

              The way I set mine up is to run the server directly on Android using Termux, having an app autostart Termux on boot, and making sure to disable battery optimizations on the app. And then I just had the phone always plugged into the outlet to maintain the battery (and of course android would just trickle charge / disable once full charged).

              Of course this isn’t perfect because you still have much more variability in play (at the OS level) than an RPi (along with not having a standard environment like debian unless you use proot), but it overall is a very powerful setup that works quite well.

        • Klear@lemmy.world
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          2 months ago

          I really doubt an iOS update will affect people using android phones as servers.

          • modus@lemmy.world
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            2 months ago

            It would affect me. I have an android virtual machine running on my iPhone.

      • thermal_shock@lemmy.world
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        2 months ago

        could be a simple hot spot cell backup, like for reporting network outage, remoting in to certain devices, etc. essentially a secondary ISP to report on main isp and troubleshoot. especially if you have smart devices you could reboot remotely.

        • wholookshere@lemmy.blahaj.zone
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          2 months ago

          An iPhone is not going to be that. This isn’t phones in general doing this, just iPhones.

          There are also far more efficient devices for that. More cost effective and more energy efficient.

          I understand wanting to reuse old devices for something, but there’s a limit to what is power efficient as well.

            • wholookshere@lemmy.blahaj.zone
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              2 months ago

              When it comes to iPhones, it’s not a shouldn’t, it’s a can’t.

              The way iOS limits background process means you can’t. I develop for iOS apps for a living.

              There’s still you should never under any circumstances allow unsupported devices to be exposed to the internet or any way. Because that’s how we get bot nets causing DDOS attacks.

    • oldfart@lemm.ee
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      2 months ago

      iPhone? Don’t these kill apps after a few minutes in background?

      • TaviRider@reddthat.com
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        2 months ago

        It’s not that simple. iOS has a really sophisticated system for deciding which things to keep in memory and which to evict, and it only does that when it needs more resources. Choosing which apps to kill is based on how recently an app was used, how much of share resources are in use, how often the app gets used, if it’s doing background processing, and other more subtle signals.

        Usually if people notice apps being killed when in the background a lot it’s because one of the apps they’re switching to is using a lot of resources, which forces the eviction of other apps.

    • lemmyingly@lemm.ee
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      2 months ago

      Interesting, tell me more please. I presume it requires loading a different OS image as standard iPhone/android OS images will pause apps and attempt to go into a deep sleep after a long enough period?

    • pedroapero@lemmy.ml
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      2 months ago

      A phone server that is disconnected from cellular is already broken anyways.