What is best camera position for Android device.?

I have problem related to camera position on android devise.i am using camera position behind the player but on mobile this is't working settings i assigned.

Player Object Scripting Code

 using UnityEngine;
 using System.Collections;
 
 public class Playercontroler : MonoBehaviour {
     public float speed = 10.0F;
     
     void FixedUpdate()
     {
      float moveHorizantail = Input.acceleration.y;
     float moveVeritical = Input.acceleration.x;
         
         Vector3 Movement = new Vector3 (moveHorizantail,0.0f,moveVeritical);
         
         rigidbody.AddForce(Movement * speed * Time.deltaTime );
     }
     
     void OnTriggerEnter(Collider other)
     {
     if (other.gameObject.tag == "Pickup")
         {
         other.gameObject.SetActive(false);    
         }
         
     }
         
 }