Twenty years after 3G was first introduced in the United States, paving the way for a new generation of mobile apps, the network is officially being phased out.
원문출처 : https://www.cnn.com/2022/02/22/tech/att-3g-network-shutdown/index.html
원문출처 : https://www.cnn.com/2022/02/22/tech/att-3g-network-shutdown/index.html