diff --git a/radio/aidl/aidl_api/android.hardware.radio.modem/current/android/hardware/radio/modem/ResetNvType.aidl b/radio/aidl/aidl_api/android.hardware.radio.modem/current/android/hardware/radio/modem/ResetNvType.aidl
index e9937f0..33c0d70 100644
--- a/radio/aidl/aidl_api/android.hardware.radio.modem/current/android/hardware/radio/modem/ResetNvType.aidl
+++ b/radio/aidl/aidl_api/android.hardware.radio.modem/current/android/hardware/radio/modem/ResetNvType.aidl
@@ -36,6 +36,12 @@
 @Backing(type="int") @JavaDerive(toString=true) @SuppressWarnings(value={"redundant-name"}) @VintfStability
 enum ResetNvType {
   RELOAD,
+  /**
+   * @deprecated NV APIs are deprecated starting from Android U.
+   */
   ERASE,
+  /**
+   * @deprecated NV APIs are deprecated starting from Android U.
+   */
   FACTORY_RESET,
 }
diff --git a/radio/aidl/android/hardware/radio/modem/IRadioModem.aidl b/radio/aidl/android/hardware/radio/modem/IRadioModem.aidl
index 491657c..15a833e 100644
--- a/radio/aidl/android/hardware/radio/modem/IRadioModem.aidl
+++ b/radio/aidl/android/hardware/radio/modem/IRadioModem.aidl
@@ -139,12 +139,13 @@
     void nvReadItem(in int serial, in NvItem itemId);
 
     /**
-     * Reset the radio NV configuration.
+     * Reboots modem.
      *
-     * This is also used to reboot the modem with ResetNvType.RELOAD.
+     * This was historically used to reset NV configuration, but starting from Android U, NV APIs
+     * are deprecated.
      *
      * @param serial Serial number of request.
-     * @param resetType Type of reset operation
+     * @param resetType Always ResetNvType.RELOAD.
      *
      * Response function is IRadioModemResponse.nvResetConfigResponse()
      */
diff --git a/radio/aidl/android/hardware/radio/modem/ResetNvType.aidl b/radio/aidl/android/hardware/radio/modem/ResetNvType.aidl
index 71736d8..95fa0d7 100644
--- a/radio/aidl/android/hardware/radio/modem/ResetNvType.aidl
+++ b/radio/aidl/android/hardware/radio/modem/ResetNvType.aidl
@@ -25,15 +25,21 @@
 @SuppressWarnings(value={"redundant-name"})
 enum ResetNvType {
     /**
-     * Reload all NV items. This may reboot modem.
+     * Reboot modem.
+     *
+     * Historically, this has been also reloading all NV items.
      */
     RELOAD,
     /**
      * Erase NV reset (SCRTN)
+     *
+     * @deprecated NV APIs are deprecated starting from Android U.
      */
     ERASE,
     /**
      * Factory reset (RTN)
+     *
+     * @deprecated NV APIs are deprecated starting from Android U.
      */
     FACTORY_RESET,
 }