iPad receiving text messages but can’t send.
I set up my mother-in-law with my husbands old iPad.(she has an android and can’t quite get how to use it as she’s 85). It was accepting text messages and she could reply. Now she can’t. She says she’s sending but the little blue arrow turns black with a white arrow and we don’t receive it. Any idea what’s wrong and what I need to do to correct the issue.
iPad, 8