Answer:
The correct answer would be Cell Phones.
Step-by-step explanation:
The device which is used most frequently to talk to someone on another location is called as cell phone. These are the wireless devices that use the digital signals to transfer the data through the waves in the air. These waves act as the medium and transfer the voice data to the other side and do the same again for the other end. Cell Phones have become so common these days. There was a time when people were not very aware of this transmission system. But now with the development and the advancement in the field of communication systems, cell phones have become the vital and common part of everyone's life at the moment. They are used to communicate from one location to another.