Last month I was looking for a new phone. Couple of options were there. I zeroed down to Sony Xperia Z1 Compact.
Its basic specs are 16GB internal storage upgradable using micorSD. Comes with a 2GB RAM. This phone is pretty fast. Unlike the other phone in the mrket, this phone is very sleek and handy. It is easy to crry.Can be upgraded to Andriod 5.*.
I just did, and it is running smoothly after the upgradation. Camera is very good, having manual and superior mode.