During the last two decades, the world of the mobile communications grew a lot, as aconsequence of the increasing necessity of people to communicate. Now, the mobilecommunications still need to improve for satisfies the user demands.The new enhancement of UMTS in concrete HSDPA and HSUPA is one of theseimprovements that the society needs. HSDPA and HSUPA which together are calledHSPA, give to the users higher data rates in downlink and uplink. The higher data ratespermit to the operators give more different types of services and at the same time withbetter quality. As a result, people can do several new applications with their mobileterminals like applications that before a computer and internet connection wererequired, now it is possible to do directly with the mobile terminal.This thesis consists in study these new technologies denominated HSDPA and HSUPAand thus know better the last tendencies in the mobile communications. Also it has aroughly idea about the future tendencies.