this post was submitted on 18 Nov 2025
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cross-posted from: https://lemmy.zip/post/53280903

This won't be a post for people that already have dedicated server hardware, unless they find something theyd like to run off an android phone specifically.

But anyways, more people than ever have and old spare, but relatively powerful, android phone laying about. I'm talking 2-4+ gb of ram and 32gb+ of storage. Usually these devices end up in a drawer, but in an age of dystopian tracking and company overreach, such a device can be an extremely useful and low power draw tool that can improve your security and experience on the web. And it also has its own battery to boot lol.

If you're wanting to do something like this you should definitely consider finding a custom android rom with more care for security and you will need to root your device. But with a rooted device you then get access to a range of tools. You will want to install magisk through the bootloader as well as termux and termux boot from within fdroid (its important you get the two of them from the same source).

USES/SERVICES With all of these theres now a few options that I can confirm all work on android armv8 devices.

0: To set up most of these services to boot on launch you can either use magisk boot scripts in /data/adb/service.d/ iirc, or you can use termuxboot scripts placed in /data/data/com.termux/files/home/.termux/boot/

1: You can run an instance of Adguard Home on your network that will have enough resources to handle quite heavy lists. You will need to import ssl certificates to properly get it working but otherwise the armv8 binary works well. Adguard home can then be set as your network's dns address. Adguard home has lists for threat protection, to malware, to ads etc.

2: Adguard is good for security but you can experience even less tracking and control by pairing it with an instance of Unbound dnsrunning on the same device. Depending on storage you can store larger dns caches which will stop dns providers from tracking every dns lookup you do.

3: This one is more optional dependent on the person but i use and love it. Searxng is a privacy focused metasearch engine that can aggregate a bunch of data from tons of sources, depending on which sources you enable. It can be used to replace your current search engine such as duckduckgo and can gather anything from torrents and apks, to music, videos and pictures, and my favourite which is its equivalent to google scholar. All in one search engine. Its recommended to disabled certain sources for speed and I would recommend disabling brave search as a source for example because they're scummy. For Searxng it will be required to create a virtual environment with the correct python dependencies and I've had to run it through termux rather than the other two which can run even through an adb shell.

4: Memos is a nice note taking webapp and its my personal choice to use but other similar calender or note apps are a good option if you wanna self host something like that. Can be ran through an adb shell or magisk boot script.

5: Others things you wanna try!!! An android phone is just a Linux computer and if theres services you've wanted a pi to run or a server in general then theres a pretty good chance you can get it running on your power efficient android phone thats just already laying around!! Heres some more ideas ive planned to try but not gotten to yet/haven't finished: -Samba drive to sync and back up your boot drive -Aur build server to pre compile different large packages to be installed to my pc without building them on the computer itself -openvpn proxy to run downloads through a protonvpn account for download managers that dont support password authentication (a surprising amount of them tbh) -Invidious instance, a youtube frontend that doesn't count as actual page views. This allows you to boycott YouTube in regards to data they can show advertisers, while still allowing you to privately subscribe and watch creators you like. It also keeps you from being tracked by your YouTube account while giving you access to better/more consistent resolution tools as well as automatically removed ads. Youtube sponsorblock extensions can also be set up to work with invidious so you don't lose much at all switching.

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[–] AmbiguousProps@lemmy.today 20 points 1 day ago (1 children)

Watch for spicy pillows.. they'll light your stuff on fire.

[–] Onomatopoeia@lemmy.cafe 3 points 1 day ago

Come on baby....

Light. My. Fire.

[–] southsamurai@sh.itjust.works 20 points 1 day ago (3 children)

One problem

Batteries.

I've used old devices as many things: security cameras, a form of intercom, digital picture frames, etc. The real problem is that the batteries eventually go bad, and become dangerous.

For the few devices that have realistically replaceable batteries, that's no big deal, but how many of those are left now?

No thanks to the potential fire, I'll pass. The few devices I have left that I can swap batteries out are becoming harder to find new batteries for as well, so that's an issue beyond their anemic hardware (I'm talking really old tablets at this point)

[–] kindenough@kbin.earth 8 points 23 hours ago (1 children)

One can extend battery life with Home Assistant and any phone that can run the HA companion app.

I have a Samsung S9+ stuck on my fridge as a home assistant remote with a script controlling a 5V/1A charger + power switch. It will turn on when the S9+ battery is at 20% and off when at 80%. Charges slow but that is on purpose. HA monitors it's battery health as well and will notify me when the state changes.

[–] Subscript5676@lemmy.ca 1 points 8 hours ago

Yo, you just reaffirmed my idea that I thought was too wild! I have to replace this old phone of mine soon cause the battery’s dying, but I guess this thing will have to stay up for a bit, or much, longer.

[–] dieTasse@feddit.org 5 points 21 hours ago

I saw a tutorial on how to bypass the battery entirely. It was oneplus 6 phone and I definitely want to do it 😀... found it: https://blog.kedio.co/post/how-to-run-a-oneplus-6t-without-battery/

[–] unexposedhazard@discuss.tchncs.de 3 points 23 hours ago (1 children)

some devices will bypass the battery when permanently plugged in. I have an old phone i use as a syncthing node and i log the battery current on it. It never actually gets used by the phone, it only suffers from some very slight internal discharge.

[–] Die4Ever@retrolemmy.com 3 points 22 hours ago* (last edited 21 hours ago) (1 children)

would it still work if you remove the battery? that'd be safer

Some phones do still work without, but i think most dont.

[–] cyborganism@lemmy.ca 18 points 1 day ago (3 children)

Bro you can just install Postmarket OS or Mobian on the thing. Even put plasma mobile. Maybe have a USB-C display connected? I don't know if that would work.

[–] Jumpropegazing@lemmy.zip 13 points 1 day ago (1 children)

i shouldve said people should do that if possible for them but theyre not supported on all devices most capabilities didnt have support for my a32 sadly

[–] cyborganism@lemmy.ca 2 points 19 hours ago (1 children)
[–] Jumpropegazing@lemmy.zip 1 points 11 hours ago

it really is yea, even if most didnt work if at least networking and cpu/gpu support works i wouldve gone for it

[–] JustEnoughDucks@feddit.nl 13 points 1 day ago (1 children)

Except not on most phones, just a small subset of old phones.

[–] A_norny_mousse@feddit.org 8 points 1 day ago

It is possible to install True Linux™ on many phones, it’s just the phone-specific bits that often don’t work too well. Ideal for this scenario though.

Of course you're still right, but with that in mind the list is much longer than you think.

[–] A_norny_mousse@feddit.org 2 points 1 day ago* (last edited 1 day ago)

I was going to comment that I really miss that extra step. A local server on Android sounds like a major PITA, not to speak of the possibility of continued data mining.

It is possible to install True Linux™ on many phones, it's just the phone-specific bits that often don't work too well. Ideal for this scenario though.

[–] cymor@midwest.social 9 points 20 hours ago (1 children)

I tried it, and it worked well for several months, and then the phone died. They're not made to run and be on for that amount of time.

[–] TheSambassador@lemmy.world 4 points 18 hours ago (1 children)

Aren't phones literally designed to run and be on all the time nowadays? Huh?

Like, yeah, you're using old hardware to run stuff and you presumably stopped using that phone for some reason, so it makes sense not to run vital services off your old phone, but for simple stuff like this it seems neat.

[–] Hominine@lemmy.world 2 points 15 hours ago

Yeah that is a strange take to say the least. I have an older pixel that has long been used as a satellite mic running grapheneOS. It stays plugged in and optimized at 80% charge and sips juice without cellular services. It still functions as an all day replacement when my primary device in the shop even.

[–] Twoafros@sh.itjust.works 6 points 1 day ago (3 children)

Thanks for writing this! I've been trying to use my old samsung as a server. Have you trying using it to host a fediverse server? Do you think thats possible?

[–] Jumpropegazing@lemmy.zip 5 points 1 day ago (1 children)

thats something i dont really know anything about lol i tried doing a cursory search and its a bit confusing to know if thats possible or not

[–] Twoafros@sh.itjust.works 2 points 1 day ago

Thanks anyway. I will keep trying, I hope somebody else tries it and it works.

[–] Jumuta@sh.itjust.works 2 points 6 hours ago

yeah you could, depending on if it can run a mainline Linux vm or is supported by postmarketos

you'd just need to port forward to your phone from the router and set up DDNS (if you don't have a public static ip). same thing as any other server.

I'd highly recommend making the phone headless and controlling it though SSH from another device. it's way more ergonomic.

[–] A_norny_mousse@feddit.org 2 points 1 day ago (1 children)

How would you serve from the phone into the internet? The only option I see is via WiFi to a router and hope your ISP gave you a static IP.

[–] SCmSTR@lemmy.blahaj.zone 1 points 1 day ago

Get free dns, get auto dns for dynamic ip on software thingy,???, profit

[–] dieTasse@feddit.org 5 points 21 hours ago* (last edited 21 hours ago)

I wish I could install postmarketOS on my Lumia 520 😢 I do have it on my old oneplus though 🥳

[–] Jumuta@sh.itjust.works 5 points 16 hours ago (1 children)

one of the best things about a phone based server is that it consumes basically no power at all

[–] Jumpropegazing@lemmy.zip 1 points 11 hours ago (1 children)

yea thats the only reason why i think getting a cheap old computer really isnt worth it, youll be charged more in power by way more and way faster compared to a phone that just sips power or a pi etc

[–] shiftymccool@piefed.ca 1 points 11 hours ago (1 children)

My entire setup uses less than 100W at idle. That includes:

  • Pi 4b (1 USB HDD)
  • HP ProDesk 600 G5 Mini
  • Custom ITX N150 NAS (4 HDD)
  • Wireless router
  • Switch
  • Modem
[–] Jumuta@sh.itjust.works 1 points 6 hours ago* (last edited 6 hours ago)

my entire phone server setup consumes less than 1W at idle :3

and the "builtin UPS" lasts for a few hours

[–] DonutsRMeh@lemmy.world 3 points 21 hours ago

Needs root. Many manufacturers have locked their bootloaders. Even pixel when you buy it through the carrier. I don’t buy shit carriers anymore, but when they give out a completely free phone, I’m taking that shit. lol

[–] ABetterTomorrow@sh.itjust.works 2 points 23 hours ago

I have a pixel 1 & 3 that I use for Meshtastic but need more ideas and a Microsoft Lumia 950 XL, still a good powerful phone.