an analysis filter bank [4, 17]. The [18] claims that EVRC-WB codec (8.55 kbps, max.) performs statistically significantly better than AMR (12.65 kbps, max.). 10.5.2 Logic Control The logic section coordinates the overall operation of the transceiver by extracting, processing, and inserting control messages. It operates from a program that is stored in the mobile phone's memory. The logic control either contains a simple microprocessor or microprocessor section stored in a portion of an ASIC. Various types of memory storage are used in devices including both ROM (read only memory) and RAM (random access memory). The os for the logic control is stored in the flash (erasable) memory Next Generation Mobile Communications Ecosystem Phone book Application Toolkit SIM as mono-application smart card in GSM UICC - multi-application platform in UMTS Phone E-Purse Ticketing Figure 10.9 UICC platform for easy upgrades. ROM is used to hold information that cannot be changed such as startup processing procedures. RAM is used to hold temporary information such as channel number or TMSI (temporary mobile system identifier). Flash memory is used to hold the operating software and user information (such as names, phone numbers, etc.) [1]. 10.5.3 UICC The UICC (Universal Integrated Circuit Card) is the multi-application removable smart card that is used only in GSM and UMTS devices. The UICC in GSM devices only contains the SIM (Subscriber Identity Module) application whereas in UMTS devices it contains USIM (Universal SIM) and other applications as shown in Figure 10.9. SIM/USIM cards store network specific information used to authenticate and identify subscribers on the network. The UICC ensures the integrity and security of all kinds of personal data and can hold from few hundred kilobytes to a couple of Gigabytes. The UICC can store browsers which make the navigation of end-user centric applications easy and intuitive. This brings the end-user experience more in line with the use of the Internet at the same time. The different