The fourth generation of mobile telephony is known as 4G. It is the successor to 3G and provides faster data speeds and greater bandwidth. 4G networks use LTE (Long-Term Evolution) technology, which is a form of OFDM (Orthogonal Frequency Division Multiplexing) that divides data into multiple sub-channels and transmits it simultaneously over different frequencies. Each sub-channel is then decoded at the receiving end. This allows for faster data transmission speeds and improved network capacity. 4G networks also use advanced modulation techniques, such as MIMO (Multiple-Input Multiple-Output) and beamforming to further improve data rates.