About F1s I informed few days ago, now we're after official premiere and so we have some aditional informations:
System: Android 5.1;
Screen: 5.5" 720p IPS, Gorilla Glass 4;
SoC: Mediatek MT6750;
RAM: 3GB;
Storage: 32GB + microSD;
Cameras: 13MP rear and 16MP front;
Battery: 3075mAh;
Others: Fingerprint scanner, Hybrid dual SIM, Oppo's Beautify 4.0;
Size: 154.5x76x7.4mm;
Weight: 160g;
Price: $270.
With this configuration $270 may seems to be a little to much but take into account used cameras and build-in machanizms of picture improvement.
This model have very specyfic target and for them it will deffinitly be interesting, for others - there are better ptions for price given but still, it's not worst deal.
Source: GSM Arena