diff --git a/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/Tag.aidl b/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/Tag.aidl
index e310b44..6ae2369 100644
--- a/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/Tag.aidl
+++ b/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/Tag.aidl
@@ -90,6 +90,7 @@
   DEVICE_UNIQUE_ATTESTATION = 1879048912,
   IDENTITY_CREDENTIAL_KEY = 1879048913,
   STORAGE_KEY = 1879048914,
+  ATTESTATION_ID_SECOND_IMEI = -1879047469,
   ASSOCIATED_DATA = -1879047192,
   NONCE = -1879047191,
   MAC_LENGTH = 805307371,
diff --git a/security/keymint/aidl/android/hardware/security/keymint/Tag.aidl b/security/keymint/aidl/android/hardware/security/keymint/Tag.aidl
index 47361d5..837fc81 100644
--- a/security/keymint/aidl/android/hardware/security/keymint/Tag.aidl
+++ b/security/keymint/aidl/android/hardware/security/keymint/Tag.aidl
@@ -726,9 +726,10 @@
     ATTESTATION_ID_SERIAL = TagType.BYTES | 713,
 
     /**
-     * Tag::ATTESTATION_ID_IMEI provides the IMEIs for all radios on the device to attested key
+     * Tag::ATTESTATION_ID_IMEI provides the IMEI one of the radios on the device to attested key
      * generation/import operations.  This field must be set only when requesting attestation of the
-     * device's identifiers.
+     * device's identifiers. If the device has more than one IMEI, a second IMEI may be included
+     * by using the Tag::ATTESTATION_ID_SECOND_IMEI tag.
      *
      * If the device does not support ID attestation (or destroyAttestationIds() was previously
      * called and the device can no longer attest its IDs), any key attestation request that
@@ -883,6 +884,20 @@
     STORAGE_KEY = TagType.BOOL | 722,
 
     /**
+     * Tag::ATTESTATION_ID_SECOND_IMEI provides an additional IMEI of one of the radios on the
+     * device to attested key generation/import operations. This field MUST be accompanied by
+     * the Tag::ATTESTATION_ID_IMEI tag. It would only be used to convery a second IMEI the device
+     * has, after Tag::ATTESTATION_ID_SECOND_IMEI has been used to convery the first IMEI.
+     *
+     * If the device does not support ID attestation (or destroyAttestationIds() was previously
+     * called and the device can no longer attest its IDs), any key attestation request that
+     * includes this tag must fail with ErrorCode::CANNOT_ATTEST_IDS.
+     *
+     * Must never appear in KeyCharacteristics.
+     */
+    ATTESTATION_ID_SECOND_IMEI = TagType.BYTES | 723,
+
+    /**
      * OBSOLETE: Do not use.
      *
      * This tag value is included for historical reasons -- in Keymaster it was used to hold