diff --git a/radio/aidl/android/hardware/radio/network/CellIdentityLte.aidl b/radio/aidl/android/hardware/radio/network/CellIdentityLte.aidl
index 27c2580..c4c76cf 100644
--- a/radio/aidl/android/hardware/radio/network/CellIdentityLte.aidl
+++ b/radio/aidl/android/hardware/radio/network/CellIdentityLte.aidl
@@ -53,7 +53,7 @@
      */
     OperatorInfo operatorNames;
     /**
-     * Cell bandwidth, in kHz.
+     * Cell bandwidth, in kHz. Must be valid as described in TS 36.101 5.6.
      */
     int bandwidth;
     /**
diff --git a/radio/aidl/android/hardware/radio/sim/IRadioSim.aidl b/radio/aidl/android/hardware/radio/sim/IRadioSim.aidl
index 7870a74..1e010b9 100644
--- a/radio/aidl/android/hardware/radio/sim/IRadioSim.aidl
+++ b/radio/aidl/android/hardware/radio/sim/IRadioSim.aidl
@@ -257,7 +257,7 @@
      * Request APDU exchange on the basic channel. This command reflects TS 27.007
      * "generic SIM access" operation (+CSIM). The modem must ensure proper function of GSM/CDMA,
      * and filter commands appropriately. It must filter channel management and SELECT by DF
-     * name commands. "sessionid" field must be ignored.
+     * name commands. "sessionId" field is always 0 (for aid="") and may be ignored.
      *
      * @param serial Serial number of request.
      * @param message SimApdu to be sent
diff --git a/radio/aidl/android/hardware/radio/sim/IRadioSimResponse.aidl b/radio/aidl/android/hardware/radio/sim/IRadioSimResponse.aidl
index 91b5729..cf08bad 100644
--- a/radio/aidl/android/hardware/radio/sim/IRadioSimResponse.aidl
+++ b/radio/aidl/android/hardware/radio/sim/IRadioSimResponse.aidl
@@ -263,6 +263,8 @@
      *   RadioError:NONE
      *   RadioError:RADIO_NOT_AVAILABLE
      *   RadioError:INTERNAL_ERR
+     *   RadioError:INVALID_ARGUMENTS when given channel is invalid or basic (channel 0)
+     *   RadioError:MISSING_RESOURCE when given channel is not open
      *   RadioError:NO_MEMORY
      *   RadioError:NO_RESOURCES
      *   RadioError:CANCELLED
@@ -325,6 +327,7 @@
      *   RadioError:NONE
      *   RadioError:RADIO_NOT_AVAILABLE
      *   RadioError:INTERNAL_ERR
+     *   RadioError:INVALID_ARGUMENTS
      *   RadioError:NO_MEMORY
      *   RadioError:NO_RESOURCES
      *   RadioError:CANCELLED