at&t

it was the most important conglomerate of my media economy class. it is under every stone. it was founded as bell telephone company by alexander graham bell, thomas watson, gardiner greene hubbard, and thomas sanders.

total assets: us$525.76 billion (as of 2020)
some of its subsidiaries:
hbo
cinemax
turner broadcasting international
cartoon network
adult swim
hulu (10%)
cnn
joint ventures
dc entertainment
warner bros.
the cw (50%)

now, existing customers don't need to switch to their new 5g plans. because at&t expands 5g to all consumer customers on unlimited wireless plans for no extra cost

you better mention this news article when you contact them.