Mobile networks use a wide range of technologies to enable 2G, 3G, 4G and 5G communications services. Examples of mobile network technologies include GSM, UMTS, CDMA2000, HSPA, LTE and others. Mobile networks also make use of fixed technologies to provide backhaul for radio networks. As things move more and more in the direction of IP, there is also a convergence between mobile telecoms and other forms of communications including fixed and online. You can find a list of articles below that explain some of the key network technologies.