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(CNN Business) —  

With the imminent arrival of 5G to more US cities, several United States senators expressed concern over how to roll out the new technology without the help of Chinese equipment makers.

5G technology is the next generation of ultra-fast wireless connections. The four main carriers in the US -— Verizon, Sprint, T-Mobile and AT&T, which owns CNN’s parent company WarnerMedia — have vowed not to use components, such as chips, from Huawei or other Chinese companies. These larger US companies never relied on Chinese technology when deploying past networks, so it’s a matter of continuing to avoid it going forward. Smaller and more rural US-based carriers do have Huawei in their networks and would need to work to phase them out.

Huawei is the world’s biggest maker of telecommunications equipment, but the US government has growing concerns that using its technology could pose a national security threat.

Tensions between the US and China remain high. The US government is investigating Huawei for possible criminal behavior and is currently in the midst of a trade war with the country.