diff --git a/radio/1.6/IRadio.hal b/radio/1.6/IRadio.hal
index a084b92..c3f15f4 100644
--- a/radio/1.6/IRadio.hal
+++ b/radio/1.6/IRadio.hal
@@ -16,7 +16,11 @@
 
 package android.hardware.radio@1.6;
 
+import @1.2::DataRequestReason;
 import @1.5::IRadio;
+import @1.5::AccessNetwork;
+import @1.5::DataProfileInfo;
+import @1.5::LinkAddress;
 
 /**
  * This interface is used by telephony and telecom to talk to cellular radio.
@@ -24,7 +28,63 @@
  * serial: which corresponds to serial no. of request. Serial numbers must only be memorized for the
  * duration of a method call. If clients provide colliding serials (including passing the same
  * serial to different methods), multiple responses (one for each method call) must still be served.
- * setResponseFunctions must work with @1.6:IRadioResponse and @1.6::IRadioIndication.
+ * setResponseFunctions must work with @1.6::IRadioResponse and @1.6::IRadioIndication.
  */
 interface IRadio extends @1.5::IRadio {
+    /**
+     * Returns the data call list. An entry is added when a setupDataCall() is issued and removed
+     * on a deactivateDataCall(). The list is emptied when setRadioPower()  off/on issued or when
+     * the vendor HAL or modem crashes.
+     *
+     * @param serial Serial number of request.
+     *
+     * Response function is IRadioResponse.getDataCallListResponse_1_6()
+     */
+    oneway getDataCallList_1_6(int32_t serial);
+
+    /**
+     * Setup a packet data connection. If DataCallResponse.status returns DataCallFailCause:NONE,
+     * the data connection must be added to data calls and a unsolDataCallListChanged() must be
+     * sent. The call remains until removed by subsequent unsolDataCallIstChanged(). It may be
+     * lost due to many factors, including deactivateDataCall() being issued, the radio powered
+     * off, reception lost or even transient factors like congestion. This data call list is
+     * returned by getDataCallList() and dataCallListChanged().
+     *
+     * The Radio is expected to:
+     *   - Create one data call context.
+     *   - Create and configure a dedicated interface for the context.
+     *   - The interface must be point to point.
+     *   - The interface is configured with one or more addresses and is capable of sending and
+     *     receiving packets. The format is IP address with optional "/" prefix length
+     *     (The format is defined in RFC-4291 section 2.3). For example, "192.0.1.3",
+     *     "192.0.1.11/16", or "2001:db8::1/64". Typically one IPv4 or one IPv6 or one of each. If
+     *     the prefix length is absent, then the addresses are assumed to be point to point with
+     *     IPv4 with prefix length 32 or IPv6 with prefix length 128.
+     *   - Must not modify routing configuration related to this interface; routing management is
+     *     exclusively within the purview of the Android OS.
+     *   - Support simultaneous data call contexts up to DataRegStateResult.maxDataCalls specified
+     *     in the response of getDataRegistrationState.
+     *
+     * @param serial Serial number of request.
+     * @param accessNetwork The access network to setup the data call. If the data connection cannot
+     *     be established on the specified access network then it should be responded with an error.
+     * @param dataProfileInfo Data profile info.
+     * @param roamingAllowed Indicates whether or not data roaming is allowed by the user.
+     * @param reason The request reason. Must be DataRequestReason:NORMAL or
+     *     DataRequestReason:HANDOVER.
+     * @param addresses If the reason is DataRequestReason:HANDOVER, this indicates the list of link
+     *     addresses of the existing data connection. This parameter must be ignored unless reason
+     *     is DataRequestReason:HANDOVER.
+     * @param dnses If the reason is DataRequestReason:HANDOVER, this indicates the list of DNS
+     *     addresses of the existing data connection. The format is defined in RFC-4291 section 2.2.
+     *     For example, "192.0.1.3" or "2001:db8::1". This parameter must be ignored unless reason
+     *     is DataRequestReason:HANDOVER.
+     *
+     * Response function is IRadioResponse.setupDataCallResponse_1_6()
+     *
+     * Note this API is the same as the 1.5
+     */
+    oneway setupDataCall_1_6(int32_t serial, AccessNetwork accessNetwork,
+            DataProfileInfo dataProfileInfo, bool roamingAllowed,
+            DataRequestReason reason, vec<LinkAddress> addresses, vec<string> dnses);
 };