The leaders said most smartphones have at least two microphones, and this technology can be implemented using real -time transmission call space characteristics.

The company announced on Monday that Nokia CEO Pekka Lundmarks called a new technology called "Immersion Audio and Video". "We have shown the future of voice calls," said Lundmark, who was also in the room when the first 2G call was made in 1991.

Current smartphone calls are monophonic, which compresses audio elements together and sounds flatter and less detailed, but the new technology will bring 3D audio where the caller will hear everything as if they were with the other person. "It's the biggest leap forward in the living voice calling experience since the introduction of monophonic telephony sound used in smartphones and PCs today," said Jenni Lukander, President of Nokia Technologies.

“This is now becoming standardized  so the network providers, chipset manufacturers, handset manufacturers can begin to implement it in their products,” Lukander said in an interview.

Nokia made the call using a regular smartphone over a public 5G network. Apart from personal calls, it can be used in conference calls, where participants' voices can be separated based on their spatial location, said Jyri Huopaniemi, head of audio research at Nokia Technologies.

Most smartphones have at least two microphones that can implement the technology, broadcasting the spatial characteristics of a call in real time, executives said. The technology is part of the upcoming 5G advanced standard, and Nokia is focused on licensing the technology, which could take several years to become widely available.