AT&T announced plans to roll out 4G LTE in at least 50 additional markets by the end of this year.
AT&T 4G LTE currently covers more than 225 million people and 370 markets, and by the end of 2013, coverage is expected to expand to nearly 270 million people and more than 400 markets.
The company noted that it has invested nearly $98 billion into operations over the past 3 years.
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You just read about LTE. Here is what it replaced:
WiBro served 2006–2018. What ultimately replaced it?
WiBro korea's deployment of mobile WiMAX (IEEE 802.16e) - an early, genuinely leading mobile-broadband network years before LTE was widespread. Its job passed to LTE — but the problem it solved, and the ideas it proved, live on in what replaced it. The standard rests here in the archive. One of 198 technologies here that opened a door and then held it for the next.