Is my coworker wrong for texting instead of calling out of work?

I work at mcdonald's. My court worker has been gone a couple of days because something happened to her dad or something. She said she texted our boss saying she wasn't gonna make it. When her shift came around, our boss called her, and asked where she was. She said she texted her. Boss said that she should have called instead. I would have personally called, but is texting okay too?

Is my coworker wrong for texting instead of calling out of work?
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