No. Samsung Galaxy C7 Pro supports 2G, 3G & 4G network.
No. Samsung Galaxy C7 Pro does not have the Optical Image Stabilization (OIS).
Yes, Samsung Galaxy C7 Pro does have the FM radio.
Yes, Samsung Galaxy C7 Pro does support OTG.
No. Samsung Galaxy C7 Pro does have the hybrid sim card slot. You can use either 2 sim cards or 1 sim card & 1 memory card.
Samsung has managed to strike a good balance between performance and battery life with the Galaxy C7 Pro.
The Galaxy C7 Pro has a lot of strong points — the build quality is great, the Full HD AMOLED display is excellent, the overall performance is adequate, and the battery life is amazing.