Why do I have sos on my top screen

Mimi2822 Said:

"Why do I have sos on my top screen: I cannot make calls or nothing"

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Getting Out of SOS Mode:

SOS means that you do not have Cellular service at this very moment, but you do have the option to make emergency calls. So, contact you Carrier to get your services back up and running.

Overview this Link: If you See No Service, Searching, or SOS on your iPhone or iPad - Apple Support

phone is stuck in SOS. Help

You have lost the service connection with your carrier. Contact them to get things going again.