It's long been a common practice among people who don't like slow phones.
    • kromem@lemmy.worldEnglish
      0·
      1 month ago

      Replace your battery.

      Your phone is 2 years old.

      Phone batteries are typically designed to last around 2 years before they really degrade because a lot of people buy new ones around every 2-3 years.

      When the battery can’t sustain the same throughput, the phone can handle this in one of two ways.

      1. Slow the phone down. This is what Apple does and why people with iPhones 2 years old complain the new update slowed their phone down.

      2. Don’t slow it down but if the throughput drops below what’s needed, die and reboot. This is what your phone is doing.

      Getting a new battery will probably stop this behavior (and for iPhone users reading this, getting a new battery for a 2 year old phone will make your phone faster).

      Edit: Seems some of you don’t believe me looking at the downvotes. Look at number 8 in this list: https://helpdeskgeek.com/help-desk/why-your-android-phone-keeps-restarting-and-9-ways-to-fix/

  • henfredemars@infosec.pubEnglish
    0·
    1 month ago

    You do it because it makes an attacker’s life harder because now I have to find two bugs instead of one.

    The entire boot chain of the phone up to the apps you run are verified successively by the component that loads it. A digital signature helps ensure that only trustworthy code ever runs. A bug must be found to bypass these checks to load malware code. For example, a bug in the image code in a web browser might cause loading of code that isn’t checked. This way the malware gets smuggled onto the phone.

    This means that if you get hacked via one bug and malware is loaded, the attacker has to work harder to solve the problem of how do I convince the phone to load it again at boot because the code it’s made of isn’t going to be approved code. When you reboot, you are effectively forcing a validation that all the code you have running is authentic, which would exclude the malware. Trick me once sure, can you survive a full pat down? Probably not. It’ll get caught.

    Unless I have a second bug to fool the normal code loading systems too, the malware can’t run. You have to go back and trigger the first bug again somehow, which places more strain on the attacker.

    • username@lemm.eeEnglish
      0·
      1 month ago

      Exactly, as you already explained in detail this is primarily for security.

      GrapheneOS has a feature to set a time after which the phone reboots in case there was no unlock. So in case a bad actor gets your phone they only have that time with a running system after the first unlock. However, if you use it normally, and unlock it in regular intervals it does not auto-reboot. This is especially neat if your threat level is not “investigative journalist” or “political activist on the run”, because then you can set the time to a longer interval and the phone does not reboot every night when you are asleep which also leads to the SIM card being locked and nobody being able to call you…

  • jgomo3@lemmy.worldEnglish
    0·
    30 days ago

    “you do need to restart your phone regularly to rid it of demons”

    typo: “daemons”, not “demons”.

    • deadcade@lemmy.deadca.deEnglish
      0·
      28 days ago

      The bootloader of your phone (if locked) is one of the most secure parts. It’s very hard to get into a modern phones bootloader. In contrast, finding an exploit in a running phone is a lot more feasible.

      If a vulnerability was abused to get into your running phone, it will persist until the phone reboots, and the bootloader verifies the core parts of the operating system at startup. In order to persist past a reboot, malware like that would need a vulnerability in the bootloader, or a bypass for its integrity checks.

      Alongside that, any background services (“daemons”) that got stuck or became slow over time are forced to restart. Operating system updates can be applied, and working memory is cleared.

      In general, it’s just good advice to just reboot your phone once in a while. There’s no harm in doing so.