HTML

tag input element type for cell phone number

<label for="telNo">Phone number:</label>
<input id="telNo" name="telNo" type="tel" />

tag input element type for cell phone number

<label for="telNo">Phone number: </label>
<input id="telNo" name="telNo" type="tel" list="defaultTels" />

<datalist id="defaultTels">
  <option value="111-1111-1111"></option>
  <option value="122-2222-2222"></option>
  <option value="333-3333-3333"></option>
  <option value="344-4444-4444"></option>
</datalist>