The user manual of Samsung Galaxy Grand Prime (2016) has been leaked online. The user manual reveals that the the Galaxy Grand Prime (2016) will be coming with Samsung’s Grace UX on top of Android 6.0 Marshmallow. Samsung had first introduced Grace UX with the recently launched Galaxy Note 7.
As per the user manual, the Samsung Galaxy Grand Prime (2016) smartphone will have Ultra Power Saving Mode, Wide Selfie and Multi Window features. These features are already available in many other Samsung smartphones. Sadly, there is no fingerprint scanner on this device and it won’t be coming with Samsung Pay. 
The device was recently spotted on Geekbench Benchmarking website as per which the Samsung Galaxy Grand Prime (2016) has 2GB RAM and Mediatek MT6737T 1.4 GHz quad core Processor and the Android 6.0 Marshmallow operating system. The device also recently spotted on FCC in dual SIM variant.
The device was also spotted on the Indian import-export website Zauba earlier, which means that the phone may get launched in India as well, though Samsung has not said anything about it yet.
Earlier, Samsung Galaxy Grand Prime (2016) was also spotted on GFX as per which it has a 5.1-inch display that has qHD (960×540 pixels) resolution, MediaTek 1.4 GHz quad-core processor, 2GB RAM, 8GB of internal storage out of which 3.4GB is reserved for the users, ARM Mali -T720 GPU and Android 6.0.1 Marshmallow operating system. Further, the Samsung phone has an 8-megapixel Autofocus camera and an LED flash in its rear panel. There is a 5-megapixel camera in its front for selfies. The GFX listing shows that the device has connectivity features like Bluetooth, GPS, and WiFi. As per the listing, the device also has accelerometer, light sensor and Proximity Sensor as well.
Note- The top pic is of Samsung Galaxy Grand Prime