sharing a prefilled sms using messages app android code example
Example: Send a SMS Text From A Link - the new code
<a href="sms:+919876543210?&body= I%27d%20like%20to%20set%20up%20an%20appointment%20for...">click to send</a>
<a href="sms:+919876543210?&body= I%27d%20like%20to%20set%20up%20an%20appointment%20for...">click to send</a>