How to communicate with android users by texting?
sending messages to contacts on android phones:
Why can’t my iphone11 communicate with android users by texting?……
iPhone 11, iOS 13
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Keeping in mind that SMS use cellular data, if you activated your SMS app, and if your cellular plan can accept SMS send/receive, you should be able to do it.
See also this support article:--> If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support
Regards
Giulio