All those cell phone users still using flip phones or other devices reliant on Verizon’s 3G network take note: the company is slowly taking steps to shut that network down. Verizon has already rolled out two 4G LTE networks, and the move will free up spectrum for a third, Gigaom reports.

The 3G turn-off, known in the industry as “spectrum reframing,” was first noticed by network-watcher Milan Milanovic, reports Gigaom, who used a spectrum analyzer to discover that 4G tests were going on in Cleveland and Manhattan in bandwidth areas traditionally reserved for 3G.

A Verizon spokeswoman confirmed to Gigaom that the it had been conducting LTE tests on 3G spectrum. But the wireless company insisted that a total 3G shutdown was a long way off.

“We continue to support our 3G customers and networks,” a Verizon Wireless spokesman told CNN Money.

Such a delay makes sense, since according to Mashable, 41 percent of Verizon’s mobile traffic still relies on 2G or 3G. In fact, 2G might actually end up outlasting 3G because Verizon uses it for its voice network.

What will Verizon do with the spectrum freed up by the 3G turn-off? To start with, PC Mag reports, the company will introduce a new, home-based 4G LTE base station that customers to plug in to extend their Verizon coverage.

“It acts as an LTE base station inside your house,” Verizon VP of Network Ops, Mike Haberman told PC Mag. “The thing will go into your house and sort of situate itself. It will figure out its environment—it’s seld-optimizing, and we can manage that well.”