html phone number

  <label for="phone">Enter your phone number:</label>
<input type="tel" 
  id="phone" name="phone" 
  pattern="[0-9]{3}-[0-9]{2}-[0-9]{3}"> One click should open the phone dialler and input the number to be called.
<a href="tel:5551234567">Call (555)123-4567</a>