Acer P5530 Projector will not allow 3D activation when using phone as a hub?

AddersFC
AddersFC Member Posts: 1 New User
edited September 2021 in Projectors
Hi team
The device permits 3d activation (from menu - not automatically, despite set to auto...shame) from all other input devices (via hdmi connection with a movie stored on usb - for example) including desktop, laptop, and android TV box.
Option not highlighted (greyed out) when utilising a type c hub adapter to send via phone, albeit still via hdmi (2 hubs tested as 1st one was older without 4k support).

If I wanted to take projector to friends for a movie night, how can I utilise phone only (without joining network)?
Or must they have laptop to connect?
Any advice offered will be greatly appreciated