commit 6a852d25b830faf8023ef8ae6ca7faffa84115f1
parent 240001e43f23c77ed7b856de873856a0d890b8f3
Author: smeeb <smeeb@web>
Date: Mon, 4 May 2026 21:19:55 +0200
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+# Installing pmOS on the Samsung A52 4G
+
+*Install notes by Boris, work in progress*
+
+> __Status:__ Got pmOS splash screen!!
+
+## Unlocking the bootloader
+
+Set up the Android phone. Connect to Wi-Fi and navigate to the phone it’s settings. All the way at the bottom press on `About Phone`. Click on `Software Information` and click 7 times on `Build number` until the phone states: `Developer mode has been enabled`.
+
+Press `back` twice and scroll down to `Developer Options`. Enable `OEM unlocking` and `USB debugging`. If `OEM unlokcing` is not there, reboot the phone and try again.
+
+## Compile Heimdall
+
+I needed a newer version of Heimdall which I couldn’t find without compiling it myself. To do this you can clone Heimdall from: https://git.sr.ht/~grimler/heimdall.
+
+```bash
+git clone https://git.sr.ht/~grimler/Heimdall
+cd Heimdall
+mkdir build && cd build
+cmake -DDISABLE_FRONTEND=ON ..
+make -j$(nproc)
+sudo make install
+```
+
+You can copy `heimdall` to your PATH (e.g. `cp bin/heimdall ~/.local/bin/`). Running `heimdall version` should say `v2.2.2` (or higher).
+
+## postmarketOS (pmbootstrap)
+
+### installation
+
+Follow the steps on the [pmOS wiki](https://wiki.postmarketos.org/wiki/Pmbootstrap/Installation)
+
+### bootstrapping
+
+Run `pmbootstrap init` for a random device (samsung a5) and set it up.
+after that I followed newbytes instructions:
+
+```bash
+cd $(pmbootstrap config aports)
+git fetch origin
+git switch newbyte/a52-v25.12
+```
+
+Run `pmbootstrap init` again. Now you are able to select `a52q`. Pick the following options:
+
+```bash
+Channel [v25.12]: v25.12
+Vendor [samsung]: samsung
+Device codename [a5]: a52q
+Username [user]: user
+Provider [default]: pipewire
+User interface [console]: console
+Change them? (y/n) [n]: n
+Extra packages [none]: none
+Use this timezone instead of GMT? (y/n) [y]: n
+Locale [en_US]: en_US
+```
+
+After this boot your device into `Download Mode`. You can get in `Donwload Mode` by fully powering off the device. Then, while holding `Volume Up` & `Volume Down` plug in a USB-C cable that is connected to your computer until you see a ‘Download’ screen. Release the buttons and press `Volume Up` to get in `Download Mode`. You will need to do this a few times :)
+
+When in `Download Mode`, run `pmbootstrap install` and follow the steps. Then, flash the kernel by running `pmbootstrap flasher --no-reboot flash_kernel`.
+
+Turn the phone off again, enter `Download Mode` again and flash the rootfs `pmbootstrap flasher --no-reboot flash_rootfs`.
+
+Turn the phone off again, enter `Download Mode` again and flash the DTBO which you can get from here https://github.com/map220v/postmarket_samsung_a72q/releases/tag/dtbo. You flash this with the compiled heimdall by running `heimdall flash --DTBO emptyDTBO.img`
+
+When you reboot the phone now you should see the pmOS splash screen.
