4G USB Modem is a device which allows like a desktop computer or laptop to access the Internet with very high speed up to 100Mbps or more. Today there are different types of LTE modems on the market that are suitable for various applications such as stationary use as a DSL replacement or mobile browsing, or industrial use M2M connectivity. The Peak speed of 4G USB Modem with LTE module could reach peak download speed up to 100Mbps and download speed at 50Mbps, so many customer call such 4G LTE USB modem as 100Mbps modem. Based on the technology of the data transmission, 4G USB modem could be divided to TDD Modem and FDD Modem. There are many suppliers worldwide to provider qualified 4G LTE surfstick to end customers, such as HUAWE, Sierra Wireless, Novatel Wireless, LG, Ericsson, BandRich, Samsung etc..And it's expected to be more and more 4G Modems available soon.