The US’ three main phone carriers have all suffered outages across the US, with customers on both coasts reporting dead signals. No explanation was immediately provided for the outages, which came amid widespread protests.

T-Mobile and AT&T users reported the outages on Monday afternoon, according to DownDetector, a website that tracks the availability of communications services and websites. Verizon users also reported issues, as are a number of smaller carriers, with most of the US’ major metropolitan areas seemingly affected. T-Mobile customers made over 100,000 outage reports, ranging from Miami, Atlanta, Chicago and Brooklyn, most noting problems making calls.

Sprint, a subsidiary of T-Mobile, has also experienced problems, in addition to US Cellular.

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