Hey guys I am trying to get user’s phone number with consent in my app but the catch is that the following code is working on emulator but not on a physical device:

MainActivity.java code:

package com.example.phonenumber;

import static android.Manifest.permission.READ_PHONE_NUMBERS;

import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.telephony.SubscriptionManager;
import android.view.View;
import android.widget.TextView;

import androidx.activity.EdgeToEdge;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class MainActivity extends AppCompatActivity {
    private TextView txtPhoneNumber;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_main);
        txtPhoneNumber = findViewById(R.id.textView);
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
            return insets;
        });
        if (ActivityCompat.checkSelfPermission(this, READ_PHONE_NUMBERS) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{READ_PHONE_NUMBERS}, 1); // Use a request code
            return;
        }


    }

    @RequiresApi(api = Build.VERSION_CODES.TIRAMISU)
    public void btnGetPhoneNumber(View view) {
        // Get phone number
        SubscriptionManager subscriptionManager = (SubscriptionManager) getSystemService(TELEPHONY_SUBSCRIPTION_SERVICE);
        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.READ_PHONE_NUMBERS) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
        String phoneNumber = subscriptionManager.getPhoneNumber(SubscriptionManager.DEFAULT_SUBSCRIPTION_ID);
        txtPhoneNumber.setText(phoneNumber);

    }
}

activity_main.xml code:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button"
        android:layout_width="280dp"
        android:layout_height="66dp"
        android:layout_marginStart="74dp"
        android:layout_marginTop="252dp"
        android:layout_marginEnd="57dp"
        android:layout_marginBottom="38dp"
        android:onClick="btnGetPhoneNumber"
        android:text="Button"
        app:layout_constraintBottom_toTopOf="@+id/textView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

I want somebody to check whether something in my code is creating this problem or what is happening. I’ve checked my code and it seems absolutely fine to me.