If you see "SOS" or "SOS only" in your iPhone's status bar, your device is not connected to your carrier network, according to Apple. Your phone will attempt to route any emergency calls through other carrier networks, if available.

An iPhone could be in SOS mode because the device is not connected to a cellular network. If a carrier isn’t having an outage, Apple suggests that iPhone customers restart their devices and try reconnecting to their network. However, if there is a widespread network outage, then iPhone users should contact their carrier.

Some Verizon customers may be experiencing service issues, as over 11,000 outages have been reported on the evening of Saturday, Aug. 30. According to Downdetector, at around 7:19 p.m. ET, there were roughly 11,134 reports of Verizon wireless outages.

More than 180,000 people have reported having connectivity problems with their Verizon devices, according to Downdetector

Verizon said some of its wireless services were down Wednesday, leaving many customers without access to voice and data services.