在切換到 3G 的網路時，使用 Network Info Widge app測試 3G 的訊號強度與設定中顯示的訊號強度不一致，而切換到 2G 或 4G 網路時，訊號強度顯示是一致。經分析導致 3G 網路顯示訊號強度不一致的原因是第三方 app 和設定中獲取訊號強度的計算公式不一樣導致。

設定 中的3G 網路計算訊號強度公式為：dBm = gsmRscpQdbm / 4，而第三方獲取 3G 網路計算訊號強度公式為：dBm = -113 + (2 * asu)。因此解決此問題的方法只需把設定 3G 網路計算訊號強度公式修改為 dBm = -113 + (2 * asu)即可，此方法的修改不會影響到訊號格顯示的問題。

具體修改方法如下：

• alps/vendor/mediatek/proprietary/frameworks/base/packages/FwkPlugin/src/com/mediatek/op/telephony/DefaultServiceStateExt.java

--- a/alps/vendor/mediatek/proprietary/frameworks/base/packages/FwkPlugin/src/com/mediatek/op/telephony/DefaultServiceStateExt.java
+++ b/alps/vendor/mediatek/proprietary/frameworks/base/packages/FwkPlugin/src/com/mediatek/op/telephony/DefaultServiceStateExt.java
@@ -304,7 +304,10 @@ public class DefaultServiceStateExt implements IServiceStateExt {
         int dBm;
         Log.d(TAG, "mapGsmSignalDbm() gsmRscpQdbm=" + gsmRscpQdbm + " asu=" + asu);
         if (gsmRscpQdbm < 0) {
-            dBm = gsmRscpQdbm / 4; //Return raw value for 3G Network
+            //dBm = gsmRscpQdbm / 4; //Return raw value for 3G Network
+            dBm = -113 + (2 * asu);
         } else {
             dBm = -113 + (2 * asu);
         }


 

• alps/vendor/mediatek/proprietary/operator/OP01/frameworks/packages/FwkPlugin/src/com/mediatek/op/telephony/ServiceStateExtOP01.java

--- a/alps/vendor/mediatek/proprietary/operator/OP01/frameworks/packages/FwkPlugin/src/com/mediatek/op/telephony/ServiceStateExtOP01.java
+++ b/alps/vendor/mediatek/proprietary/operator/OP01/frameworks/packages/FwkPlugin/src/com/mediatek/op/telephony/ServiceStateExtOP01.java
@@ -129,7 +129,10 @@ public class ServiceStateExtOP01 extends DefaultServiceStateExt {
         int dBm;
 
         if (gsmRscpQdbm < 0) {
-            dBm = gsmRscpQdbm / 4; // Return raw value for TDD 3G network.
+            //dBm = gsmRscpQdbm / 4; // Return raw value for TDD 3G network.
+            dBm = -113 + (2 * asu);
         } else {
             dBm = -113 + (2 * asu);
         }