Can't text or call from iphone to android (and vice versa)

    I have an LG G4. My daughter has an iphone 6.  Unless we are on a wifi network we cannot call or text each other. If I try to call her using the tmobile network it goes straight to her voice mail. If she tries to call me it doesn't go through. If I try to text her it doesn't go through and if she tries to text me her phone gives her an error message. We have 2 other iphones on our account and I have no problems with either one of those. Is there a setting on her phone that needs to be reset?

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