Samsung smartphones with model numbers SM-G5510 and SM-G5520 ha received Wi-Fi certification & listed on GFXBench now SM-G5510 & SM-G5220 was imported to India few days back  Samsung SM-G5510 was certified at TENAA now SM-5520 has been certified by TENAA
According to Listing Samsung SM-G5520 has the same specs as SM-G5510
- 5-inch HD (1280 x 720 pixels) display
- 1.4Ghz Qualcomm Snapdragon 425
- 2GB RAM, 16GB internal storage, expandable upto 128GB via micro SD
- Android 6.0.1 Marshmallow
- Dimensions: 142.8x 69.5 x 8.1 mm; Weight: 143 grams
- 13MP rear camera
- 5MP front camera
- 4G LTE, GPS, Bluetooth
- 2,600mAh battery
According to GFXBench listing  it has a 4.8-inch HD display with 1280 x 720 pixel resolution and is powered by a quad-core 1.4GHz Qualcomm Snapdragon 425 (Cortex A53 – ARMv8) processor with Adreno 308 GPU. It comes with 2GB of RAM and 16GB of inbuilt storage capacity. It runs on the Android 6.0.1 Marshmallow OS out of the box. SM-G5510  has a 12-megapixel rear camera with LED flash, FHD, auto focus, face detection and touch focus. It also comes with a 5-megapixel front facing camera with full-HD recording. No more details has been leaked yet.
Samsung  SM-G5510 and SM-G5520 is expected to launch soon