final SubscriptionManager subscriptionManager = SubscriptionManager.from(getApplicationContext());

final List activeSubscriptionInfoList = subscriptionManager.getActiveSubscriptionInfoList();

int simCount = activeSubscriptionInfoList.size();

btnBack.setText(simCount+" Sim available");

Log.d("MainActivity: ","simCount:" +simCount);

for (SubscriptionInfo subscriptionInfo : activeSubscriptionInfoList) {

Log.d("MainActivity: ","iccId :"+ subscriptionInfo.getIccId()+" , name : "+ subscriptionInfo.getDisplayName());

}