Vivo recently announced and unveiled the X5Pro which is due to be released here and mysteriously two extra devices popped up on SIRIM's database, and that being the Y37 and the Y31.
Funny thing is that we have heard of the Y37, but the Y31 seems a mystery to us. There is totally no information pertaining the Y31 anywhere but with what we can see on SIRIM is that it supports 3G only, so it seems to be an entry-level device.
The Y37 we have info on, as it is written all over their website. It has a 5.5-inch 720p IPS display, 2GB of RAM, 16GB of expandable storage, a 2,720mAh battery and runs on Funtoush OS 2.1 which is based on Android 5.0 Lollipop. It is fitted with a 13MP main camera and a 5MP selfie camera, and supports 4G LTE but as for processor, on the specs sheet it states a 1.4G quad-core processor, but on the product info pages it is stated as an octa-core instead, so we aren't really sure yet. So, we will just need to wait till we get more info from Vivo.
[source : Lowyat]