Rails 6.1 now
supports
rendering SMS links.
We can use the recently added sms_to
rendering SMS anchor links.
This SMS anchor link when clicked pops open user’s SMS client targetting the specified phone number.

Using sms_to
Here are a few ways you can use the sms_to
helper in your Rails views:
We can just pass the phone number. In this case, the phone number is also used as the name of the link.
ERB code:
<%= sms_to "2025550181" %>
Rendered HTML:
<a href="sms:2025550181;">
2025550181
</a>
We can explicitly specify the name of the link.
ERB code:
<%= sms_to "2025550181", "Text me!" %>
Rendered HTML:
<a href="sms:2025550181;">
Text me!
</a>
We can specify the content of the SMS body.
ERB code:
<%= sms_to "2025550181", "Text me!", body: "Hi, I have few question:" %>
Rendered HTML:
<a href="sms:2025550181;?&body=Hi%2C%20I%20have%20few%20question%3A">
Text me!
</a>
We can also pass a block to the sms_to
helper if we want more control over the content of the rendered SMS anchor tag:
ERB code:
<%= sms_to "2025550181" do %>
<strong>Text me!</strong>
<% end %>
Rendered HTML:
<a href="sms:2025550181;">
<strong>Text me!</strong>
</a>