private int mNumSlots;
final TelephonyManager tm =
(TelephonyManager) getActivity().getSystemService(Context.TELEPHONY_SERVICE);
mNumSlots = tm.getSimCount();
for (int i = 0; i < mNumSlots; ++i) {
final SubscriptionInfo sir = mSubscriptionManager.getActiveSubscriptionInfoForSimSlotIndex(i); //当sir 为空时。说明那个卡槽没卡,可以得到当前手机运营商
}
当sir 为空时。说明那个卡槽没卡