Today a new Samsung Galaxy SM-G9198 model number spotted on GFX benchmark this could be Samsung Galaxy S6 mini
It feature a 4.6″ HD display (1280 x 768) and powered by Snapdragon 808 processor (2x Cortex-A57 and 4x Cortex-A53) with Adreno 418 GPU coupled with 2GB of RAM. SM-G9198 also features a 16MP 16:9 rear camera with 1080p video recording and a 5MP front facing camera. The device runs on the latest Android 5.1.1 Lollipop.on storage it may come with 16GB of internal storage.
This could be Samsung S6 mini or some other device. we have to wait for some more info on it.