Warthog Every time I turn my phone on a message appears and tells me I am load a different operating system. It then show a G google symbol for before finishing and showing the Graphene symbol.
Is this suppose to happen and is it normal ?
Welcome. Yes, this is completely normal. The yellow warning screen is just telling you you are running an "unofficial" (in Google's eyes) OS (which is GrapheneOS) so that is normal and fine. The Google logo is also normal. I'm assuming It still has to be there for one of two reasons;
Google wants its users to know they are using a Google product even if you have a custom OS (like GrapheneOS) installed or;
GrapheneOS has to let that logo be there on boot for maybe something like copyright reasons or stuff like that? So that it's still a "Google" phone even though your running GrapheneOS.
Those are just what I think, I'm not sure but that makes sense to me. Hopes this helps! :)