A mobile phone (also known as a hand phone, cell phone, or cellular telephone) is a small portable radio telephone. The mobile phone can be used to communicate over long distances without wires. ... In the 21st century, a new type of mobile phone, called smartphones, have become popular.
A mobile phone (also known as a hand phone, cell phone, or cellular telephone) is a small portable radio telephone. The mobile phone can be used to communicate over long distances without wires. ... In the 21st century, a new type of mobile phone, called smartphones, have become popular.