Android: TelephonyManager.getSimSerialNumber() returns null

Question

in which cases this method returns a null reference? Can only depend on the sim card? Doesn't exist, in these cases, an alternative to retrieve an identification number of the latter?

Thanks to all!

Solution 1

Please make sure whether you have added the following permission in the Android Manifest, if not please add this statement add try again.

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

Note: Add this permission tag outside the application tag..

Sample Snippet:

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

All the Best

Solution 2

try the below code..i will help full for u..

TelehponyManager manager = (TelehponyManager)getSystemService(TELEPHONY_SERVICE);

String imei = manager.getDeviceId();

String imsi = manager.getSubscriberId();

Solution 3

getSimSerialNumber() needs privileged permissions from Android 10 onwards, and third party apps can't register this permission.

See : https://developer.android.com/about/versions/10/privacy/changes#non-resettable-device-ids

A possible solution is to use the TELEPHONY_SUBSCRIPTION_SERVICE from Android 5.1, to retrieve the sim serial number. Steps below:

• Check for READ_PHONE_STATE permission.
• Get Active subscription list.( Returns the list of all active sim cards)

• Retrieve the sim details from Subscription Object.

  if ( isPermissionGranted(READ_PHONE_STATE) ) {

          String simSerialNo="";
  
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
  
              SubscriptionManager subsManager = (SubscriptionManager) context.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE); 
  
              List<SubscriptionInfo> subsList = subsManager.getActiveSubscriptionInfoList();
  
              if (subsList!=null) {
                  for (SubscriptionInfo subsInfo : subsList) {
                      if (subsInfo != null) {
                          simSerialNo  = subsInfo.getIccId());
                      }
                  }
              }
          } else {
              TelephonyManager tMgr = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
              simSerialNo = tMgr.getSimSerialNumber();
          }
      }
  

Check if this helps