HTC 4G Mobile

4G refers to the fourth generation of cellular wireless standards. The nomenclature of the generations generally refers to a change in the fundamental nature of the service, non-backwards compatible transmission technology and new frequency bands. 4G mobile networks use a network based on the IP address system used for the internet. Facilities such as IP telephony, ultra-broadband Internet access, gaming services and streamed multimedia are be provided to users. The CDMA spread spectrum radio technology used in 3G systems and IS-95 is abandoned and replaced by frequency-domain equalization schemes, for example OFDMA. This is combined with MIMO (i.e. multiple antennas (Multiple In Multiple Out)), dynamic channel allocation and channel-dependent scheduling. Predecessors of 4G include LTE,3GPP Long Term Evolution , WiMAX, Mobile WiMAX (IEEE 802.16e-2005) , mobile wireless broadband access (MWBA) standard , UMB (Ultra Mobile Broadband)-UMB (Formerly EV-DO Rev. C)