Start from Shift OS-L, so first follow that manual here: Anleitung / Guide - ShiftOS - Installation/Wiederherstellung mittels Fastboot Paketen | SHIFTPHONES or use the UBPorts Installer from here: GitHub - ubports/ubports-installer: A simple tool to install Ubuntu Touch on UBports devices
After successfully flashing OS-L (may also work with OS-G, but I was successfully with OS-L), flash iodé again. I was then able to relock the bootloader.
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I used iodé GSI on the ShiftPhone 8 before.
Probably a dumb question, but do I need to flash the device-specific build from scratch with deleting userdata?
Or is there any way to switch from a GSI to a device-specific build without deleting user data?
Sorry, but I think you will need a clean install, in fact the recommendation is to install stock firmware then install iodé on top of that to ensure full hardware compatibility.
Thanks. Relocking the bootloader worked now. I used the installer with the official 6.9 version, not the beta.
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