Can’t send sms on iPad
Why can’t I send messages to an android device on my iPad Pro? There’s not even an option to turn on sms.
iPad Pro, iPadOS 15
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Because iPads, even cellular ones are incapable of sending SMSs on their own. You need a paired iPhone to route the SMS messages through.
See here: link-> How to forward SMS/MMS text messages from your iPhone to your iPad, iPod touch or Mac - Apple Support