Facebook CEO Mark Zuckerberg visited Samsung Electronics' manufacturing complex in Suwon, Wednesday.
Zuckerberg's visit is related to the two firms' partnership on virtual reality (VR), said Samsung officials.
One, who asked not to be identified, said Samsung may be in charge of manufacturing VR-embedded devices from Facebook's designs, software drawing and content.
This could be a natural next step since Samsung's VR headset was developed by Oculus, owned by Facebook.
Samsung and Facebook are being asked by investors to find "what's next" amid challenging business situations. Both need to boost their sagging fortunes. Samsung is seeing a dwindling profit, while Facebook is being hit by a flight of users.
Facebook bought a messenger service WhatsApp and photo-sharing service firm InstaGram, recently, without much result to show its investors.
Google, Sony and SoftBank also identified the VR headset market as one of next cash-generators.
On a related note, Samsung said it has conducted tests on a fifth-generation (5G) network capable of transmitting 150 megabytes of data per second in a vehicle travelling at over 100 kilometers per hour. Faster networks are crucial to support VR-related technologies.