What do people usually do with spare Android phones? Any practical use cases?

I’ve been thinking about practical ways people reuse spare or unused Android devices instead of letting them sit in a drawer.

I’ve seen cases where phones are used for testing, monitoring, background tasks, or other always-online purposes after a one-time setup. No user interaction, just keeping the device connected and running.

Curious what real-world use cases others have actually found useful. Are there setups that worked well long-term, or things to avoid?

Not trying to promote anything here — genuinely interested in how people approach this.

16 points | by AndroidShare 1 day ago

12 comments

  • netfortius 3 hours ago
    I always wondered if they'd be of any use as multimedia server, with local content deliver and an USB device hanging out of it, for unused libraries...
  • estimator7292 20 hours ago
    If you're into HomeAssistant, you can turn one into something akin to an Echo Show, complete with local voice assistant.

    Just yesterday I learned the Echo Show 5 can be pwned so I dug mine out, put LineageOS on it, and now it's a satellite for my HA server. Her name is Janet now.

  • Bridged7756 23 hours ago
    You can turn one into a server.

    I used to keep one as a sort of backup internet connection, since there are "unlimited 4 hours of internet" prepaid plans, like $1, here that work pretty well when used as an access point if your home internet's down for whatever reason.

    Nowadays I just sell them

  • sandreas 23 hours ago
    Since I opted out of Google via GrapheneOS, I use one of my old phones in my car just to navigate.

    Another phone is an audiobook listening device for my kids (they choose and I play).

    Of course I also have a dedicated dev phone.

  • markus_zhang 1 day ago
    I have a $180 spare Android phone. I slapped PagerDuty on it to serve as my on-call phone. I also installed WhatsApp and Signal on it as I don't want to keep them on my primary phone (less distract).
  • elbci 1 day ago
    I use a non-smart, non-internet phone but I do have a android phone in the car to make the multimedia/maps/whatever work properly - more and more stuff assumes you have a modern spyware device
    • eimrine 19 hours ago
      You have bought a spyware car and complain that it wants to befriend with your spyware phone? That's a lot of spyware and a lot of complains.
  • tim-tday 13 hours ago
    Mine is bricked forever because google non consensually entered me into 2fa using a dead email address. Which is good because I needed a reason to never trust those fuckers again.
  • eth0up 20 hours ago
    I do:

        Secondary camera (with OpenCam) *oss
    
        Security camera (various software)
    
        Alarm clock with custom audio files (tibetan bells make a very unobtrusive wakeup sound)
    
        Guitar tuner & general audio                      recorder
    
        Mp3 player while working in harsh environments 
    
    And it stays simless, in airplane mode, after a nice adb session where I uninstall just about everything I can. I could easily live without it, but I'm often glad to have it.
    • randomnumber314 18 hours ago
      Are you plugging them in for permanent use? Or are you using them as mobile security cameras?
      • eth0up 16 hours ago
        Around house. When in use, I piwer it with an old nook charger which I think is gentler on the battery.

        I can always find a purpose for an old phone. But nothing on the Internet, unless it still gets updates.

  • markus_zhang 1 day ago
    I don't know why you got downvoted so I could not reply your question. Here is my reply:

    > Out of curiosity, have you found any downsides with that setup long-term? Battery health or missed notifications, for example?

    Yeah, it is inconvenient to bring two phones. That's definitely a downside. Battery health is fine. I never missed any notifications so far.

    • AndroidShare 1 day ago
      Thanks for clarifying, that’s helpful. Battery health was exactly what I was curious about, since long-term standby usage can sometimes degrade older cells faster than active daily use. Good to hear notifications have been reliable so far. Have you noticed any differences over time in idle drain or thermal behavior when the device stays online continuously?
  • bell-cot 1 day ago
  • eimrine 1 day ago
    [flagged]
  • KomoD 1 day ago
    > I’ve been thinking about practical ways people reuse spare or unused Android devices instead of letting them sit in a drawer.

    I sell them or give to family.

    > Not trying to promote anything here — genuinely interested in how people approach this.

    Adding this makes me think you do want to promote something.