LTE (4G), GSM (3G & 2G), CDMA (3G & 2G), and ISM. The fundamental differences between these four modern technologies is the way they transmit and receive information.
LTE (Long Term Evolution) is a 4G communication standard designed to be 10x faster than standard 3G. the technology provides IP-Based communication of voice and multimedia and streaming at between 100 Mbit per sec and 1 Gbit per second. LTE has an algorithm that is able to send large chunks of data via IP. This approach streamlines the traffic and reduces latency.
CDMA stands for Code Division Multiple Access. CDMA uses a multiple access mode of communication. This is where several transmissions are made over the same channel simultaneously. Using a speed spectrum, each transmission is assigned a unique code that corresponds to the source and destination of the signal.
ISM: industrial, scientific and medical radio bands reserved for medical, scientific and industrial use and not intended for telecommunication. Originally this band of radio frequencies was intended for use in industrial, scientific and medical ISM machines that operate at this range in order not to interfere with the wider