diff --git a/sensors/2.0/multihal/HalProxy.cpp b/sensors/2.0/multihal/HalProxy.cpp
index 80d7296..dcdccac 100644
--- a/sensors/2.0/multihal/HalProxy.cpp
+++ b/sensors/2.0/multihal/HalProxy.cpp
@@ -123,9 +123,9 @@
     return Result::INVALID_OPERATION;
 }
 
-Return<Result> HalProxy::activate(int32_t /* sensorHandle */, bool /* enabled */) {
-    // TODO: Proxy API call to appropriate sub-HAL.
-    return Result::INVALID_OPERATION;
+Return<Result> HalProxy::activate(int32_t sensorHandle, bool enabled) {
+    return getSubHalForSensorHandle(sensorHandle)
+            ->activate(zeroOutFirstByte(sensorHandle), enabled);
 }
 
 Return<Result> HalProxy::initialize(
@@ -163,15 +163,14 @@
     return result;
 }
 
-Return<Result> HalProxy::batch(int32_t /* sensorHandle */, int64_t /* samplingPeriodNs */,
-                               int64_t /* maxReportLatencyNs */) {
-    // TODO: Proxy API call to appropriate sub-HAL.
-    return Result::INVALID_OPERATION;
+Return<Result> HalProxy::batch(int32_t sensorHandle, int64_t samplingPeriodNs,
+                               int64_t maxReportLatencyNs) {
+    return getSubHalForSensorHandle(sensorHandle)
+            ->batch(zeroOutFirstByte(sensorHandle), samplingPeriodNs, maxReportLatencyNs);
 }
 
-Return<Result> HalProxy::flush(int32_t /* sensorHandle */) {
-    // TODO: Proxy API call to appropriate sub-HAL.
-    return Result::INVALID_OPERATION;
+Return<Result> HalProxy::flush(int32_t sensorHandle) {
+    return getSubHalForSensorHandle(sensorHandle)->flush(zeroOutFirstByte(sensorHandle));
 }
 
 Return<Result> HalProxy::injectSensorData(const Event& /* event */) {
@@ -218,6 +217,14 @@
     return Return<void>();
 }
 
+ISensorsSubHal* HalProxy::getSubHalForSensorHandle(uint32_t sensorHandle) {
+    return mSubHalList[static_cast<size_t>(sensorHandle >> 24)];
+}
+
+uint32_t HalProxy::zeroOutFirstByte(uint32_t num) {
+    return num & 0x00FFFFFF;
+}
+
 }  // namespace implementation
 }  // namespace V2_0
 }  // namespace sensors
diff --git a/sensors/2.0/multihal/include/HalProxy.h b/sensors/2.0/multihal/include/HalProxy.h
index 9d5787c..809d07e 100644
--- a/sensors/2.0/multihal/include/HalProxy.h
+++ b/sensors/2.0/multihal/include/HalProxy.h
@@ -118,6 +118,24 @@
      * SubHal object pointers that have been saved from vendor dynamic libraries.
      */
     std::vector<ISensorsSubHal*> mSubHalList;
+
+    /*
+     * Get the subhal pointer which can be found by indexing into the mSubHalList vector
+     * using the index from the first byte of sensorHandle.
+     *
+     * @param sensorHandle The handle used to identify a sensor in one of the subhals.
+     */
+    ISensorsSubHal* getSubHalForSensorHandle(uint32_t sensorHandle);
+
+    /*
+     * Zero out the first (most significant) byte in a number. Used in modifying the sensor handles
+     * before passing them to subhals.
+     *
+     * @param num The uint32_t number to work with.
+     *
+     * @return The modified version of num param.
+     */
+    static uint32_t zeroOutFirstByte(uint32_t num);
 };
 
 }  // namespace implementation