Verizon sees four key elements of 5G: Fiber, spectrum, sites, and software

Hans Vestberg, current Chief Technical Officer of Verizon Wireless (former CEO of Ericsson), says an operator has to evaluate its assets and “sit down and say, ‘Should I buy some spectrum? Or should I continue with densification?’ About three, four years ago, carrier aggregation did not exist…Today you can do carrier aggregation up to maybe six different frequencies. It is an enormous capacity improvement. So when you sit and think about, ‘Should I do carrier aggregation on five bands? Or should I buy spectrum?’ that becomes an economic model.”

https://www.rcrwireless.com/20180521/carriers/verizon-network-capex-spectrum-tag17