Why 'half broken "phone"'? I used GrapheneOS for a while now, it works pretty well imho, the only problem I encountered till now is with maps. Finding a good and no-play-services maps app is a major issue. I use OsmAnd and it's quite mediocre compared to Play Services based options. With that (important) exception, I love the de-googled experience. The funny part is that to be de-googled the best choice is buying... a Google Pixel phone.