<div>
  <input type="text" name="phone_number_1">
  <input type="text" name="phone_description_1">
</div>
<div>
  <input type="text" name="phone_number_2">
  <input type="text" name="phone_description_2">
</div>
<div>
  <input type="text" name="phone_number_3">
  <input type="text" name="phone_description_3">
</div>
<div>
  <input type="text" name="phone_number_4">
  <input type="text" name="phone_description_4">
</div>