My device comes with 2023-05-05 21:30 Firmware
From the Myoo web site we can DL MINI+PLUS 0505 firmware.zip
From Onion there is newer MINI+PLUS 0609.
https://www.reddit.com/r/MiyooMini/comments/14f3xja/onion_os_beta_420_install_fixes_and_firmware/
So we might as well do this now. Form what I understand we just need to put img file in root of Fat32 SD Card. Then it should update to 0609.
Then we flash Onion to SD Card.Â
So Miyoo has internal small disk for main firmware unlike the rg35XX.
The 0609 img file is named miyoo354_fw.img It says to put in root of fat32 sd card. Plug in to charge. Then it will auto update and delete .img file when done.
I am now at 2023-06-09 21:22 in System -> Device Info