start a phone call

<6>[  572.228485] phone_call_status_store: phone_call_status 1
<6>[  572.549224] [AUD][voice.c:remote_cb_function] remote_cb_function() len = 36, id = 81
<6>[  572.549896] [AUD] voice: [radio] EVENT_ACQUIRE_START
<6>[  572.550292] [AUD] voice: handle voice event 3, (voc_state 3, dev_event 0)
<6>[  572.550994] [AUD][voice.c:voice_change_sample_rate] network = 1, vote freq = 8000
<6>[  572.551361] [AUD] voice: voice_change_sample_rate: network 1, freq 8000
<6>[  572.552032] [AUD][voice.c:voice_change_sample_rate] voice_change_sample_rate: set freq 48000 success.
<6>[  572.553680] [AUD][voice.c:voice_cmd_device_info] voice_cmd_device_info(), tx_dev = 106, rx_dev = 206, tx_sample = 48000, rx_sample = 48000
<6>[  572.554687] [AUD] voice: [voice] send CMD_DEVICE_INFO (tx 106, rate 48000) (rx 206, rate 48000)
<6>[  572.555389] [AUD] board_spade_audio: spade_get_rx_vol(0, 0, 100) => 400
<6>[  572.555786] [AUD] voice: rx dev_id = 0, tx_dev_id = 1,rx_vol = 400, tx_mute = 0, rx_mute = 0
<6>[  572.556457] [AUD][voice.c:voice_cmd_device_info] rx_vol = 400, tx_mute = 0
<6>[  572.557312] [AUD] voice: [voice] send CMD_ACQUIRE_DONE
<6>[  572.558013] [AUD] voice: voc_state -> VOICE_ACQUIRE
<6>[  572.630920] [AUD][afe.c:afe_dsp_event] afe_dsp_event: msg_id 2
<6>[  572.631622] [AUD][afe.c:afe_dsp_event] unexpected message from afe
<6>[  573.240753] [CAM]led_ril_status_value = 1
<6>[  573.241638] phone_call_status_store: phone_call_status 1
<6>[  573.252990] [CAM]led_ril_status_value = 1
<6>[  573.254180] phone_call_status_store: phone_call_status 1