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根本原因apns-conf.xml里面没有 符合 物理网卡 的配置

可以先加一个APN试一下，看看默认的MCC和MNC是什么

然后在”命令行“查询一下

adb shell sqlite3 /data/user_de/0/com.android.providers.telephony/databases/telephony.db "'select * from carriers where mcc=\"460\" and mnc=\"13\";'"

如果是空就证明没有要添加一条

刷机的要在apns-conf.xml里加

升级的要在它就不会再从apns-conf.xml里去读，要代码里动态加，要看你的卡是哪张卡，仿照下面的写吧，改一下是哪张卡

+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.provider.Telephony;+    setSelectedApnKey();//-------------------加在你想加的位置+    public static final String PREFERRED_APN_URI = "content://telephony/carriers/";+private void setSelectedApnKey() {+        final ContentResolver resolver =mContext.getContentResolver();
+
+        final ContentValues values = new ContentValues();
+                    values.put(Telephony.Carriers.NAME, "aaa");
+                    values.put(Telephony.Carriers.MMSPROXY,"");
+                    values.put(Telephony.Carriers.MMSPORT,"");
+                    values.put(Telephony.Carriers.MMSC,"");
+
+                    values.put(Telephony.Carriers.TYPE,"mms");
+
+                    values.put(Telephony.Carriers.MCC, "460");
+                    values.put(Telephony.Carriers.MNC, "13");
+
+                    values.put(Telephony.Carriers.NUMERIC, "460" + "13");
+
+                    /*if (mCurMnc != null && mCurMcc != null) {
+                        if (mCurMnc.equals(mnc) && mCurMcc.equals(mcc)) {
+                            values.put(Telephony.Carriers.CURRENT, 1);
+                        }
+                    }*/
+        //values.put("apn_id", key);
+        resolver.insert(getUriForCurrSubId(Uri.parse(PREFERRED_APN_URI)), values);
+    }    
+    private Uri getUriForCurrSubId(Uri uri) 
+    {
+        SubscriptionInfo mSubscriptionInfo =getSubscriptionInfo(1);
+        final int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId()
+                : SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+        if (SubscriptionManager.isValidSubscriptionId(subId)) {
+            return Uri.withAppendedPath(uri, "subId/" + String.valueOf(subId));
+        } else {
+            return uri;
+        }
+    }
+
+    private SubscriptionInfo getSubscriptionInfo(int subId) {
+        return SubscriptionManager.from(getActivity()).getActiveSubscriptionInfo(subId);
+    }