HTC is scaling its lauded One flagship down and up – we already saw the One mini, now thanks to some spy shots we're getting a closer look at the Butterfly S, an update on the company's first 1080p phone with One hardware.

One of the most noticeable changes is that the loudspeaker on the back has been removed, instead there are two BoomSound loudspeakers on the front. Those maintain the design of the Butterfly speakers, instead of going for the One look.

In fact, the whole HTC Butterfly S sticks closely to the original design, which means a polycarbonate exterior instead of the aluminum unibody that has become the signature of the HTC One.

Another One trait – the two button arrangement has been replaced by standard three capacitive buttons.

Rumored specs for the HTC Butterfly S include a 5" 1080p screen as the original, Snapdragon 600 chipset (upgrade from S4 Pro), UltraPixel camera and microSD card slot.

HTC has sent out invites for a June 19 event when it will officially announce the Butterfly S and show off the new Desire 600. That's a day ahead of Samsung's Ativ and Galaxy event.