Any upcoming decent and compact smartphone ?

Hey there,

My current phone is 3.7" (HTC Saga, was one of the best when it was released)
I'm looking for a newer phone, but I can't really find anything decent smaller than 4.5".

The Samsung S5 Mini, and the HTC One Mini 2 are two smartphones 4.5" which are both recent and "compact" but i wish i could find even smaller.

I've seen some phones 4.3", such as Samsung J1, Samsung Ace4, HTC 310 or HTC 320, but sadly these phones are rather low-end products.

Do you know any upcoming phones (within the next 6 months) which would be mid/high-end products and 4.3" (or smaller) ?

Thanks

up ^