enjoy

 **LTE** 
 LTE is known as "Long term evolution"

1)  commonly marketed as 4G LTE   is a standard for wireless 
    communication of  high-speed  data for mobile phones and 
    data terminals.
    
     -->  It is based on the GSM/EDGE and UMTS/HSPA network technologies,
          increasing the capacity and    speed   using a different radio 
          interface  together   with  core  network   improvements 
                
             *GSM = Global System for Mobile communication
             *EDGE = Enhance Data Rates for GSM revolution
             *UMTS = Universal Mobile Telecommunication
             *HSPA = High Speed Packet Acces
    
         *** Data speeds of LTE Advanced **** 

 Peak download ---- 1 Gbit/s
    Peak upload --- 500 Mbit/s
  
  this all start from different type of generation:: 
               
  1> 1G (1981/1982)
  2> 2G (1991)
  3> 3G (1998)
  4> 4G (2008) 
        
  1G)) (or 1-G) refers to the first generation of wireless 
     telephone technology (mobile telecommunications). These are the analog 
     telecommunications standards that were introduced in the 1980s 
     and continued until being replaced by 2G digital telecommunications. 
     The main difference between the two mobile telephone systems (1G and 2G), 
     is that the radio signals used by
   --> 1G networks are analog, 
   --> while 2G networks are digital.    
    
  2G)) 2G (or 2-G) is short for second-generation wireless 
     telephone technology. Second generation 2G cellular 
     telecom networks were commercially launched on the 
     GSM standard in Finland by Radiolinja (now part of 
     Elisa Oyj) in 1991.

  3G)) 3G, short form of third Generation, is the third generation 
     of mobile telecommunications technology.This is based on a set of 
     standards used for mobile devices and mobile telecommunications use 
     services and networks that comply with the International Mobile 
     Telecommunications-2000 (IMT-2000) specifications by the International
     Telecommunication Union. 3G finds application in  wireless voice 
     telephony, mobile Internet access, fixed wireless Internet access, 
     video calls and mobile TV.
     
    -->3G telecommunication networks support services that provide an 
    information transfer rate of at least 200 kbit/s. Later 3G 
    releases, often denoted 3.5G and 3.75G, also provide mobile 
    broadband access of several Mbit/s to smartphones and mobile modems 
    in laptop computers. This ensures it can be applied to wireless 
    voice telephony, mobile Internet access, fixed wireless Internet 
    access, video calls and mobile TV technologies

  4G))4G, short for fourth generation, is the fourth generation of 
     mobile telecommunications technology, succeeding 3G and preceding 5G.
     A 4G system, in addition to the usual voice and other services of 3G,
     provides mobile ultra-broadband Internet access, for example to laptops 
     with USB wireless modems, to smartphones, and to other mobile devices. 
     Conceivable applications include amended mobile web access, IP telephony, 
     gaming services, high-definition mobile TV, video conferencing, 3D television, 
     and cloud computing