Verizon has announced it will launch at least 20 more 5G cities in 2019, while Sprint says it will start its first 5G markets in the coming weeks.

Verizon will launch its ultra wideband-branded mobile, 3GPP-standards-based 5G service in 30 more markets in 2019. Twenty cities are announced now for 2019, with more to come. Markets announced include Atlanta, Boston, Charlotte, Cincinnati, Cleveland, Columbus, Dallas, Des Moines, Denver, Detroit, Houston, Indianapolis, Kansas City, Little Rock, Memphis, Phoenix, Providence, San Diego, Salt Lake City and Washington DC.

Sprint, meanwhile, is readying to launch its first 5G markets in the coming weeks. Atlanta, Chicago, Dallas and Kansas City are supposed to be the first 5G markets, while Houston, Los Angeles, New York, Phoenix and Washington DC will follow by the end of June.

What are the key technologies and processes that will underpin successful, full 5G deployments? Check out our 5G Big Picture Prime Reading report to find out.

So let's take a look at the latest 5G developments:

AT&T Inc. (NYSE: T)
What: Mobile 5G using the 3rd Generation Partnership Project (3GPP) 5G New Radio (NR) standard with fixed wireless 5G expected in 2020.
Where: Parts of Atlanta, Charlotte, Dallas, Houston, Indianapolis, Jacksonville, Louisville, Oklahoma City, New Orleans, Raleigh, San Antonio and Waco (2018)
Parts of Chicago, Las Vegas, Minneapolis, Nashville, Orlando, Los Angeles, San Diego, San Francisco and San Jose (2019)
When: Mobile 5G is being rolled out now
Frequencies: 2018 (& beyond): 39GHz; post-2020: Sub-6GHz
Suppliers (known so far): Ericsson, Netgear, Nokia, Samsung
Devices: Netgear Nighthawk 5G
Anticipated download speeds: Theoretical peaks pegged at 1.2 Gbit/s, while actual speeds will be lower, according to AT&T
Capex plan for 2019: $23 billion

For more:

Sprint Corp. (NYSE: S)
What: Mobile 5G using the 3rd Generation Partnership Project (3GPP) 5G New Radio (NR) standard
Where: Atlanta, Chicago, Dallas, Houston, Kansas City, Los Angeles New York City, Phoenix and Washington, DC
When: Initial launches will start in May and into 2019
Frequencies: 2.5GHz
Suppliers (known so far): Ericsson, HTC, LG Electronics, Nokia, Samsung, Qualcomm
Devices: Forthcoming LG V50 ThinQ & Samsung S10 5GSmartphones and a 5G hotspot
Anticipated download speeds: 250-300 Mbit/s (mobile)
Capex plan for 2018: $5-$6 billion, 2019 expectations slated for FY Q4

For more: