diff --git a/android/hal-ipc-api.txt b/android/hal-ipc-api.txt
index ae62c10..ca41cff 100644
--- a/android/hal-ipc-api.txt
+++ b/android/hal-ipc-api.txt
Notification parameters: Status (4 octets)
Handle (4 octets)
+
+
+Bluetooth Handsfree Client HAL (ID 10)
+======================================
+
+Android HAL name: "hf_client" (BT_PROFILE_HF_CLIENT_ID)
+
+Commands and response:
+
+ Opcode 0x00 - Error response
+
+ Valid status values: 0x01 = Fail
+ 0x02 = Not ready
+ 0x03 = No memory
+ 0x04 = Busy
+ 0x05 = Done (already completed)
+ 0x06 = Unsupported
+ 0x07 = Parameter invalid
+ 0x08 = Unhandled
+ 0x09 = Authentication failure
+ 0x0a = Remote device down
+
+ Opcode 0x01 - Connect command/respose
+
+ Command parameters: Remote address (6 octects)
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x02 - Disonnect command/response
+
+ Command parameters: Remote address (6 octetcs)
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x03 - Connect Audio command/response
+
+ Command parameters: Remote address (6 octets)
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x04 - Disconnect Audio command/response
+
+ Command parameters: Remote address (6 octets)
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x05 - Start Voice Recognition command/response
+
+ Command parameters: <none>
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x06 - Stop Voice Recognition command/response
+
+ Command parameters: <none>
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x07 - Volume Control command/response
+
+ Command parameters: Volume type (1 octet)
+ Volume (1 octet)
+ Response parameters: <none>
+
+ Valid volume types: 0x00 = Speaker
+ 0x01 = Microphone
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x08 - Dial command/response
+
+ Command parameters: Number (string)
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x09 - Dial Memory command/response
+
+ Command parameters: Location (1 octet)
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x10 - Handle Call Action command/response
+
+ Command parameters: Action (1 octet)
+ Call Index (1 octet)
+ Response parameters: <none>
+
+ Valid actions: 0x00 = CHLD_0
+ 0x01 = CHLD_1
+ 0x02 = CHLD_2
+ 0x03 = CHLD_3
+ 0x04 = CHLD_4
+ 0x05 = CHLD_1x
+ 0x06 = CHLD_2x
+ 0x07 = ATA
+ 0x08 = CHUP
+ 0x09 = BTRH_0
+ 0x10 = BTRH_1
+ 0x11 = BTRH_2
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x11 - Query Current Calls commad/response
+
+ Command parameters: <none>
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x12 - Query Current Operator Name
+
+ Command parameters: <none>
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x13 - Retrieve Subscriber Info command/response
+
+ Command parameters: <none>
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x14 - Send DTMF Code command/response
+
+ Command parameters: Code (1 octet)
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+ Opcode 0x15 - Request Last Voice Tag Number command/response
+
+ Command parameters: <none>
+ Response parameters: <none>
+
+ In case of an error, the error response will be returned.
+
+Notifications:
+
+ Opcode 0x81 - Connection State Changed notification
+
+ Notification parameters: State (1 octet)
+ Peer Features (1 octet)
+ Address (6 octets)
+
+ Valid State values: 0x00 = Disconnected
+ 0x01 = Connecting
+ 0x02 = SLC Connected
+ 0x03 = Disconnecting
+
+ Note: Peer Features is valid only in SCL Connected state
+
+ Opcode 0x82 - Audio State Changed notification
+
+ Notification parameters: State (1 octet)
+ Address (6 octets)
+
+ Valid State values: 0x00 = Disconnected
+ 0x01 = Connecting
+ 0x02 = Connected
+ 0x03 = Connected mSBC
+
+ Opcode 0x83 - Voice Recognition State Changed notification
+
+ Notification parameters: State (1 octet)
+
+ Valid State values: 0x00 = VR Stopped
+ 0x01 = VR Started
+
+ Opcode 0x84 - Network State Changed notification
+
+ Notification parameters: State (1 octet)
+
+ Valid State values: 0x00 = Network Not Available
+ 0x01 = Network Available
+
+ Opcode 0x85 - Network Roaming Type Changed notification
+
+ Notification parameters: Type (1 octet)
+
+ Valid Type values: 0x00 = Home
+ 0x01 = Roaming
+
+ Opcode 0x86 - Network Signal Strength notification
+
+ Notification parameters: Signal Strength (1 octet)
+
+ Opcode 0x87 - Battery Level notification
+
+ Notification parameters: Battery Level (1 octet)
+
+ Opcode 0x88 - Current Operator Name notification
+
+ Notification parameters: Name (string)
+
+ Opcode 0x89 - Call Indicatior notification
+
+ Notification parameters: Call (1 octet)
+
+ Valid Call values: 0x00 = No Call In Progress
+ 0x01 = Call In Progress
+
+ Opcode 0x8a - Call Setup Indicator notification
+
+ Notification parameters: Call Setup (1 octet)
+
+ Valid Call Setup values: 0x00 = None
+ 0x01 = Incoming
+ 0x02 = Outgoing
+ 0x03 = Alerting
+
+ Opcode 0x8b - Call Held Indicator notification
+
+ Notification parameters: Call Held (1 octet)
+
+ Valid Call Held values: 0x00 = None
+ 0x01 = Hold and Active
+ 0x02 = Hold
+
+ Opcode 0x8c - Resposne and Hold Status notification
+
+ Notification parameters: Status (1 octet)
+
+ Valid Status values: 0x00 = Held
+ 0x01 = Accept
+ 0x02 = Reject
+
+ Opcode 0x8d - Calling Line Identification notification
+
+ Notification parameters: Number (string)
+
+ Note: This will be called only on incoming call if number is
+ provided.
+
+ Opcode 0x8e - Call Waiting notification
+
+ Notification parameters: Nunmber (string)
+
+ Opcode 0x8f - Current Calls List notification
+
+ Notification parameters: Index (1 octet)
+ Direction (1 octet)
+ Call State (1 octet)
+ Multiparty (1 octet)
+ Number (string)
+
+ Valid Direction values: 0x00 = Outgoing
+ 0x01 = Incoming
+
+ Valid Call Sate values: 0x00 = Active
+ 0x01 = Held
+ 0x02 = Dialing
+ 0x03 = Alerting
+ 0x04 = Incoming
+ 0x05 = Waiting
+ 0x06 = Call held by Response and Hold
+
+ Valid Multiparty values: 0x00 = Single Call
+ 0x01 = Multiparty (conference) Call
+
+ Note: Number might be empty
+
+ Opcode 0x90 - Volume Changed notification
+
+ Notification parameters: Type (1 octet)
+ Volume (1 octet)
+
+ Valid Type values: 0x00 = Speaker
+ 0x01 = Microphone
+
+ Opcode 0x91 - Command Complete Callback notification
+
+ Notification parameters: Type (1 octet)
+ CME (1 octet)
+
+ Valid Type values: 0x00 = OK
+ 0x01 = Error
+ 0x02 = Error no carrier
+ 0x03 = Error busy
+ 0x04 = Error no answer
+ 0x05 = Error delayed
+ 0x06 = Error blacklisted
+ 0x07 = Error CME
+
+ Note: CME parameter is valid only for Error CME type
+
+ Opcode 0x92 - Subscriber Service Info Callback notification
+
+ Notification parameters: Name (string)
+ Type (1 octet)
+
+ Valid Type values: 0x00 = Service unknown
+ 0x01 = Service voice
+ 0x02 = Service fax
+
+ Opcode 0x93 - In Band Ring Settings Callback notification
+
+ Notification parameters: State (1 octet)
+
+ Valid State values: 0x00 = In band ringtone not provided
+ 0x01 = In band ringtone provided
+
+ Opcode 0x94 - Last Voice Call Tag Number Callback notification
+
+ Notification parameters: Number (string)
+
+ Opcode 0x95 - Ring Indication notification
+
+ Notification parameters: <none>