[zeeya]

@FXB78 Any idea why CoreELEC team doesn't officially support the Ugoos' dual boot firmware installed? Since you have told here that it works well.

Their recommended dual boot installation using ceemmc utility has a drawback of updating Android, which cannot be done if CoreELEC dual boot exists on eMMC (installed by ceemmc). It should be removed, Android updated and restored back.
Am I missing something? Any pointers?

You can't install via ceemmc because the bootloader is locked, your only option is dual boot. I don't even think any internal install is supported by CoreELEC due to the chance you could brick the box. There's probably a thread on their forums about it. Just use dual boot and you will be fine, it works perfectly well.

Thanks for the clarification