Cosmo with Android v15 can not Update via Vol + Console / TWRP

[marcelmuellerio]

Hello, i have a new Cosmo with Android 9 v15 but in this Version i can not go to twrp mode via Power and Vol -

if i boot with Power + Vol + i have not the choose to select install custom os.

i have searched today in all boards / forums and pages but i have no idea so i can update to the v19 ... v22

any help here ?

regards
Marcel

[Dom (shymega)]

You can't update via OTA (and do NOT use my V25 update patch), so you'll need to flash V23 from the Planet support site.

V19 is the minimum version that supports multi-boot.

[marcelmuellerio]

it works thanks now from v15 to v23 with bootloader custom image now i can install linux (happyweekendcoding) :-D