China's Volt Typhoon reportedly breached Singtel in 'test-run' for US telecom attacks
More recently, another Chinese-government-backed group Salt Typhoon was accused of breaking into US telecom companies' infrastructure. These intrusions came to light in October with the spies reportedly breaching Verizon, AT&T, and Lumen Technologies, although all three have thus far declined to comment to The Register about the hacks.