AT&T has publicly come out with its 5G roadmap.
It follows Verizon's vow to hold field tests this year.
AT&T, the nation'ssecond-largest wireless, carrier said Friday that it planned to start development work on 5G technology with partnersEricsson and Intel in the second quarter.
The company's roadmap marks the next steps on the long journey to 5G.
ThoughAT&T and Verizon are moving on tests now, the industry doesn't expect the technology to be widely available until 2020.
