TL;DR Be very careful with qbootctl because it can brick your phone.

This is an update of https://www.janwagemakers.be/jekyll/postmarketos/shift/2025/09/18/shift6mq_sdcard_postmarketos.html where I describe my dual boot setup between postmarketOS and android on my shift6mq shift-phone.

Preface: For a very long time, this was my email setup at home: Mutt : MUA (Mail User Agent) postfix : MTA (Message transfer agent) fetchmail : MRA (Mail retrieval agent) procmail : MDA (Message delivery agent) Procmail was used to sort my email in Maildir folders depending on rules defined in .procmailrc. I’ve replaced my ~/.procmailrc with a bash script.

Let’s describe my current dual boot setup between postmarketOS and android on my shift6mq shift-phone. Slot A: postmarketOS /boot with rootfs on SD card (mmcblk0) Slot B: android (shiftOS-G 5)

Preface : My shift6mq shift-phone is back. It was broken, so to fix it, I had send it to shift to flash my phone.