First what is the acronyme (synonyme) of 4G
4G is the fourth generation of board band celullar network technology, succeeding 3G, and preceding 5G. A 4G system must provide capabilities defined by ITU in IMT Advanced. Potential and current applications include amended mobile web access, IP telephony, gaming services,
The first-release LTE standard was commercially deployed in Oslo , Norway, and Stockholm, Sweden in 2009, and has since been deployed throughout most parts of the world. It has, however, been debated whether first-release versions should be considered 4G LTE
second you open your phone dialer type *#*#4636#*#*
select phone information
then you go down and you change the network type to LTE and re turn on you mobile connexion if needed ...
it s available just for some android phones