UPDATE 8/5: If you were affected by last week's T-Mobile outage, you may be able to secure a service credit by contacting the company's customer service. "Our teams are actively working the reports of technical challenges impacting some customers," T-Mobile tells PCMag. In January, Verizon was hit by a major outage, during which subscribers also saw their phones display SOS Mode. It's more likely that AT&T or Verizon customers tried to call someone on T-Mobile and couldn't get through due to T-Mobile's outage. “If you're having trouble reaching someone, it may be due to the reported outage on T-Mobile's network.”