Ring ring ring ring ring ring ring BSDphone! Wired has a writeup on various smartphones that let you actually install software on the hardware you own, unlike some well-known examples. One of the phones mentioned is the Motorola A1200, or “Ming”, which is possibly BSD licensed open source code. Most of the pages that talk about it say “Linux-based”, so it may just be the translations, which are the only place I’ve seen BSD licensing mentioned so far.
Update: Poop. It’s just the translations. The operating system itself is a Linux 2.4 kernel.