When iPhones aren’t connected to a cellular network, they will typically alert the user by giving an indication in the phone’s status bar. Those notifications usually say “No Service” or “Searching,” but your phone may also say “SOS” or “SOS only.”

Verizon Communications (VZ.N) said late on Wednesday it was making progress in restoring mobile phone service and plans to offer impacted consumers credits for an hours-long outage that disrupted call...

Alert systems in New York City and Washington, DC, notified residents the outage may affect some users trying to call 911.