[LG V20 Questions & Answers] Team DevDigitel:
reference this for code ( 3)

ypedef enum {
RIL_E_SUCCESS = 0,
RIL_E_RADIO_NOT_AVAILABLE = 1, /* If radio did not start or is resetting */
RIL_E_GENERIC_FAILURE = 2,
RIL_E_PASSWORD_INCORRECT = 3, /* for PIN/PIN2 methods only! */
RIL_E_SIM_PIN2 = 4, /* Operation requires SIM PIN2 to be entered */
RIL_E_SIM_PUK2 = 5, /* Operation requires SIM PIN2 to be entered */
RIL_E_REQUEST_NOT_SUPPORTED = 6,
RIL_E_CANCELLED = 7,
RIL_E_OP_NOT_ALLOWED_DURING_VOICE_CALL = 8, /* data ops are not allowed during voice
call on a Class C GPRS device */
RIL_E_OP_NOT_ALLOWED_BEFORE_REG_TO_NW = 9, /* data ops are not allowed before device
registers in network */
RIL_E_SMS_SEND_FAIL_RETRY = 10, /* fail to send sms and need retry */
RIL_E_SIM_ABSENT = 11, /* fail to set the location where CDMA subscription
shall be retrieved because of SIM or RUIM
card absent */
RIL_E_SUBSCRIPTION_NOT_AVAILABLE = 12, /* fail to find CDMA subscription from specified
location */
RIL_E_MODE_NOT_SUPPORTED = 13, /* HW does not support preferred network type */
RIL_E_FDN_CHECK_FAILURE = 14, /* command failed because recipient is not on FDN list */
RIL_E_ILLEGAL_SIM_OR_ME = 15 /* network selection failed due to
illegal SIM or ME */
} RIL_Errno;

typedef enum {
RIL_CALL_ACTIVE = 0,
RIL_CALL_HOLDING = 1,
RIL_CALL_DIALING = 2, /* MO call only */
RIL_CALL_ALERTING = 3, /* MO call only */
RIL_CALL_INCOMING = 4, /* MT call only */
RIL_CALL_WAITING = 5 /* MT call only */
} RIL_CallState;

typedef enum {
RADIO_STATE_OFF = 0, /* Radio explictly powered off (eg CFUN=0) */
RADIO_STATE_UNAVAILABLE = 1, /* Radio unavailable (eg, resetting or not booted) */
RADIO_STATE_SIM_NOT_READY = 2, /* Radio is on, but the SIM interface is not ready */
RADIO_STATE_SIM_LOCKED_OR_ABSENT = 3, /* SIM PIN locked, PUK required, network
personalization locked, or SIM absent */
RADIO_STATE_SIM_READY = 4, /* Radio is on and SIM interface is available */
RADIO_STATE_RUIM_NOT_READY = 5, /* Radio is on, but the RUIM interface is not ready */
RADIO_STATE_RUIM_READY = 6, /* Radio is on and the RUIM interface is available */
RADIO_STATE_RUIM_LOCKED_OR_ABSENT = 7, /* RUIM PIN locked, PUK required, network
personalization locked, or RUIM absent */
RADIO_STATE_NV_NOT_READY = 8, /* Radio is on, but the NV interface is not available */
RADIO_STATE_NV_READY = 9 /* Radio is on and the NV interface is available */
} RIL_RadioState;

typedef enum {
RADIO_TECH_UNKNOWN = 0,
RADIO_TECH_GPRS = 1,
RADIO_TECH_EDGE = 2,
RADIO_TECH_UMTS = 3,
RADIO_TECH_IS95A = 4,
RADIO_TECH_IS95B = 5,
RADIO_TECH_1xRTT = 6,
RADIO_TECH_EVDO_0 = 7,
RADIO_TECH_EVDO_A = 8,
RADIO_TECH_HSDPA = 9,
RADIO_TECH_HSUPA = 10,
RADIO_TECH_HSPA = 11,
RADIO_TECH_EVDO_B = 12,
RADIO_TECH_EHRPD = 13,
RADIO_TECH_LTE = 14,
RADIO_TECH_HSPAP = 15 // HSPA+
} RIL_RadioTechnology;

// Do we want to split Data from Voice and the use
// RIL_RadioTechnology for get/setPreferredVoice/Data ?
typedef enum {
PREF_NET_TYPE_GSM_WCDMA = 0, /* GSM/WCDMA (WCDMA preferred) */
PREF_NET_TYPE_GSM_ONLY = 1, /* GSM only */
PREF_NET_TYPE_WCDMA = 2, /* WCDMA */
PREF_NET_TYPE_GSM_WCDMA_AUTO = 3, /* GSM/WCDMA (auto mode, according to PRL) */
PREF_NET_TYPE_CDMA_EVDO_AUTO = 4, /* CDMA and EvDo (auto mode, according to PRL) */
PREF_NET_TYPE_CDMA_ONLY = 5, /* CDMA only */
PREF_NET_TYPE_EVDO_ONLY = 6, /* EvDo only */
PREF_NET_TYPE_GSM_WCDMA_CDMA_EVDO_AUTO = 7, /* GSM/WCDMA, CDMA, and EvDo (auto mode, according to PRL) */
PREF_NET_TYPE_LTE_CDMA_EVDO = 8, /* LTE, CDMA and EvDo */
PREF_NET_TYPE_LTE_GSM_WCDMA = 9, /* LTE, GSM/WCDMA */
PREF_NET_TYPE_LTE_CMDA_EVDO_GSM_WCDMA = 10, /* LTE, CDMA, EvDo, GSM/WCDMA */
PREF_NET_TYPE_LTE_ONLY = 11 /* LTE only */
} RIL_PreferredNetworkType;

/* Source for cdma subscription */
typedef enum {
CDMA_SUBSCRIPTION_SOURCE_RUIM_SIM = 0,
CDMA_SUBSCRIPTION_SOURCE_NV = 1
} RIL_CdmaSubscriptionSource;

/* User-to-User signaling Info activation types derived from 3GPP 23.087 v8.0 */
typedef enum {
RIL_UUS_TYPE1_IMPLICIT = 0,
RIL_UUS_TYPE1_REQUIRED = 1,
RIL_UUS_TYPE1_NOT_REQUIRED = 2,
RIL_UUS_TYPE2_REQUIRED = 3,
RIL_UUS_TYPE2_NOT_REQUIRED = 4,
RIL_UUS_TYPE3_REQUIRED = 5,
RIL_UUS_TYPE3_NOT_REQUIRED = 6
} RIL_UUS_Type;

/* User-to-User Signaling Information data coding schemes. Possible values for
* Octet 3 (Protocol Discriminator field) in the UUIE. The values have been
* specified in section 10.5.4.25 of 3GPP TS 24.008 */
typedef enum {
RIL_UUS_DCS_USP = 0, /* User specified protocol */
RIL_UUS_DCS_OSIHLP = 1, /* OSI higher layer protocol */
RIL_UUS_DCS_X244 = 2, /* X.244 */
RIL_UUS_DCS_RMCF = 3, /* Reserved for system mangement
convergence function */
RIL_UUS_DCS_IA5c = 4 /* IA5 characters */
} RIL_UUS_DCS;

/* User-to-User Signaling Information defined in 3GPP 23.087 v8.0
* This data is passed in RIL_ExtensionRecord and rec contains this
* structure when type is RIL_UUS_INFO_EXT_REC */
typedef struct {
RIL_UUS_Type uusType; /* UUS Type */
RIL_UUS_DCS uusDcs; /* UUS Data Coding Scheme */
int uusLength; /* Length of UUS Data */
char * uusData; /* UUS Data */
} RIL_UUS_Info;

/* CDMA Signal Information Record as defined in C.S0005 section 3.7.5.5 */
typedef struct {
char isPresent; /* non-zero if signal information record is present */
char signalType; /* as defined 3.7.5.5-1 */
char alertPitch; /* as defined 3.7.5.5-2 */
char signal; /* as defined 3.7.5.5-3, 3.7.5.5-4 or 3.7.5.5-5 */
} RIL_CDMA_SignalInfoRecord;