Complex sentence: Following the acquisition by AT&T, Cricket released devices accessing AT&T's 3G, HSPA +, and 4G LTE network, once on the AT&T network, Cricket customers have coverage in 99% of the United States.
Split into simpler sentences: Following the acquisition by AT&T, Cricket will be releasing devices capable of accessing AT&T's 3G, HSPA +, and 4G LTE network. Once on the AT&T network, Cricket customers will have coverage in 99% of the United States.