Samsung is working on a couple of new smartphones, the SM-G5510 and the SM-G5520. These smartphones haven't been announced yet, but they have been spotted on GFXBench and Wi-Fi Alliance's website.
The SM-G5510 seems to be a successor to the Galaxy Grand On (SM-G5500), and its specifications have been revealed on GFXBench. According to the listing, the device features a 4.8-inch (most probably a 5-inch one) HD display, a 12-megapixel primary camera with 1080p video recording, and a 5-megapixel selfie camera. The phone seems to be running Android 6.0.1 using the Snapdragon 425 octa-core processor, 2GB RAM, and 16GB internal storage.
Sadly, there's no information about the specifications or design of the SM-G5520 as Wi-Fi certifications don't reveal this information. However, we will report back whenever we stumble upon any new information about these new devices.