If you suspect that Straight Talk is having a large-scale outage, try the quick checks before proceeding to troubleshoot your phone.
Now turn off your phone's wifi!
Search social media for #StraightTalkdown. Look for timestamps that indicate other people are having the same issues as you.
Check the Straight Talk Facebook page for updates. If there is a large-scale problem, the company may post information about it here.
Use a third-party "status checker" website such as Downdetector or Outage.Report. These sites provide maps of outages and other information to show you exactly where and what problems are occurring in Straight Talk's network.
