To me, "my server is now..." implies there was some server, it used to do server things, but now it has been repurposed to do something else.

When I read the title, I literally thought "wow, I've seen a lot of people make servers out of old unused phones, but this is the first time I've heard someone make a phone out of an old unused server!"

Agreed, a more appropriate title might be “my server now runs on a phone”