How to Find Out Carrier's Name in Android Programmatically?

Last Updated : 24 Apr, 2025

In this article we will see how to retrieve the carrier name on Android device. This information can be useful for applications that need to provide specific functionality based on the user's cellular network provider. A sample video is given below to get an idea about what we are going to do in this article.

Step-by-Step Implementation

Step 1: Create a New Project in Android Studio

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Kotlin as the programming language.

Step 2: Adding Permissions

Navigate to app > manifests > AndroidMainfest.xml and add this

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

This permission declaration in Android manifest file specifies that the app requests permission to access the phone state which includes information about the device cellular network like carrier name.

Step 3: Creating Layout

We have created normal ui by adding one textview,one button and one Spinner for selecting the sim slot

activity_main4.xml:

XML

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout      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:layout_width="match_parent"     android:background="@color/white"     android:layout_height="match_parent"     android:gravity="center"     tools:context=".MainActivity4">      <androidx.cardview.widget.CardView         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_margin="16dp"         app:cardCornerRadius="8dp">          <RelativeLayout             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:gravity="center"             android:padding="16dp">              <TextView                 android:id="@+id/tv"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="Hello World!"                 android:textSize="24sp" />              <Button                 android:id="@+id/btnSubmit"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:layout_below="@id/tv"                 android:layout_marginTop="26dp"                 android:text="Submit" />              <Spinner                 android:id="@+id/spin"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:layout_below="@id/btnSubmit"                 android:layout_marginTop="16dp" />          </RelativeLayout>      </androidx.cardview.widget.CardView>  </RelativeLayout>

UI Output:

Step 4: Working on Kotlin File

Code retrieves and displays the carrier name for a selected SIM slot that is selected from a spinner after requesting the necessary permissions.

Kotlin

package com.ayush.gfgapp  import android.Manifest import android.content.Context import android.content.pm.PackageManager import android.os.Bundle import android.telephony.SubscriptionManager import android.widget.ArrayAdapter import android.widget.Button import android.widget.Spinner import android.widget.TextView import androidx.appcompat.app.AppCompatActivity import androidx.core.app.ActivityCompat  class MainActivity4 : AppCompatActivity() {     // Declaring UI elements     private lateinit var spin: Spinner     private lateinit var tv: TextView     private lateinit var btnSubmit: Button      override fun onCreate(savedInstanceState: Bundle?) {         super.onCreate(savedInstanceState)         setContentView(R.layout.activity_main4)          // Initializing UI elements from our xml file         tv = findViewById(R.id.tv)         spin = findViewById(R.id.spin)         btnSubmit = findViewById(R.id.btnSubmit)          // Seting a click listener for the submit button         btnSubmit.setOnClickListener {             getCarrierName()         }          // Defining options for the Spinner         val slots = arrayOf("1", "2")          // Creating an ArrayAdapter for the Spinner         val _spinAdapter = ArrayAdapter(this, android.R.layout.simple_spinner_dropdown_item, slots)          // Seting the ArrayAdapter on the Spinner         spin.adapter = _spinAdapter          // Requesting permission to read phone state         ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_PHONE_STATE), PackageManager.PERMISSION_GRANTED)     }      private fun getCarrierName() {         // Geting the SubscriptionManager         val susbsManager = getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE) as SubscriptionManager          // Checking if the app has the required permission (that is Manifest.permission.READ_PHONE_STATE)         if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {             // If permission is not granted, display a message             tv.text = "Permission not granted"             return         }          // Retrieving the list of active subscriptions         val subsManagerList = susbsManager.activeSubscriptionInfoList          try {             // Geting the selected slot number from the Spinner             val selectedSlot = spin.selectedItem.toString().toInt()              // Retrieving information about the subscription in the selected slot             val subscriptionInfo = subsManagerList[selectedSlot - 1]              // Geting the carrier name or display "Unknown" if not available             val stringCarrierName = subscriptionInfo.carrierName?.toString() ?: "Unknown"              // Displaying the carrier name in text view             tv.text = stringCarrierName         } catch (e: Exception) {                tv.text = "Sim in slot ${spin.selectedItem.toString()} not available"         }     } }

Output:

How to Obtain the Connection Information Programmatically in Android?

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How to Find Out Carrier's Name in Android Programmatically?

Step-by-Step Implementation

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