When I attempt to text my Galaxy S9 only enters the word null and I am unable to text ?

[Android Central Question]

When I attempt to text my Galaxy S9 only enters the word null and I am unable to send a text.

 

[B. Diddy]

Welcome to Android Central! Which messaging app, and which carrier? Are you able to receive messages? What about calls and mobile data -- are you able to access the web using your mobile data signal?

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[mustang7757]

Same thing on another message app like Google messages?