Make android number pad keyboard visible for TMPro_InputField

I want a number pad to open in my android game when I click the TMPro_InputField. However, I am not able to do it. If I could help to make Number Pad (TouchScreenKeyboardType.NumberPad) to work in my game. Thank you.

using System.Collections; using System.Collections.Generic; using UnityEngine; using TMPro;

public class InputNumber : MonoBehaviour {

 public TMP_InputField input;

 // Use this for initialization
 void Start () {
     input.keyboardType = TouchScreenKeyboardType.NumberPad;
 }
 
 // Update is called once per frame
 void Update () {
     
 }

}