The Samsung Galaxy Grand Prime was released in 2014 and it had the model number SM-G531 , which makes it likely that a 2016 model of the same phone is in the works, as a device with the model number SM-G532F has been spotted recently on India’s import and export tracking website, Zauba.
Considering that the two model numbers are similar with a numerical difference of 1, it is probable that there will be a Samsung Galaxy Prime 2016 model. The device in the Zauba listing also possesses a 5-inch display, the same size of the display on the 2014 Samsung Galaxy Grand Prime.
Other specifications of the original Samsung Galaxy Grand Prime include a 2,600mAh battery, 8MP/5MP camera combo (rear & front), Snapdragon 410 processor, 1GB of RAM and 16GB. This information should not be taken too seriously, though, as no official confirmation has been made by Samsung Mobile.