The widest coverage from the highest number of base stations,
with over 75,000 sites across the country running at 1800 MHz,
2100 MHz and 900 MHz to produce a maximum frequency
bandwidth of 120 MHz (60 MHz x 2).
When the set-up done, recommend to turn off and turn on your
device for the new 4G experience.
press *412*1#
press *412*2#