Sheridan Prasso

It’s been three years since US officials sounded the alarm: Citing national security threats, the White House, Congress and federal agencies began ordering that certain Chinese-made equipment had to be ripped out from telecommunications and security networks. But delays, deferrals and a serious funding shortfall have left that threat largely unaddressed, and Chinese technology remains in place throughout the US — including in some surprising places. More than 100 telecom providers are still connecting mobile phone calls for hundreds of thousands of customers with gear from Huawei and ZTE.