Camera Switched for Smartphone

Hello guys im doing my game for Adroid and i want to create 3 or more Cameras and to be able to switch them with some icon on the screen ,I'm using C# and i got just this simple camera using UnityEngine;

public class CameraController : MonoBehaviour { public GameObject Player;

 private Vector3 offset; 


 public void Start()
 {
     this.offset = this.transform.position - this.Player.transform.position;
 }

 public void LateUpdate()
 {
     this.transform.position = this.Player.transform.position + this.offset;
 }

}

It's from tutorial