Here are methods you can use to change your 3G phone to 4G.
open your phone’s dialer and information this code ##4636##
after you have input this code you will quickly land into a testing screen where 4 choices will be shown
utilization measurement and
Click on the phone information
look down until you see set favored system type
from the favored system, type select LTE/GSM/CDMA auto
presently look down and click the update catch and you are acceptable at this point
your phone is currently 4g fit.
if there is a mistake while refreshing have a go at picking another sort which has the LTE choice
after you have select this attempt and update it again till you see the one that will work for your phone
presently your web will work quicker