HID Telephony Usage on ios

Question

Hello everybody, 
 i have crated an Report id for the telephony usage on iOS from here https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-247/IOHIDFamily/IOHIDUsageTables.h.auto.html . 
 static uint8_t report_map_data[] = { // End Collection (Application) // Report ID 2: Advanced buttons 0x05, 0x0B, // Usage Page (Telephony Devices) 0x09, 0x01, // Usage (Phone) 0xA1, 0x01, // Collection (Application) 0x85, 0x02, // Report Id (2) 0x15, 0x00, // Logical minimum (0) 0x25, 0x01, // Logical maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 
 
 0x09, 0x20, // Usage (HookSwitch) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 0x09, 0x23, // Usage (Hold) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 0x09, 0x2F, // Usage (PhoneMute) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 0x09, 0x06, // Usage (Telephony Key Pad) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 
 
 0x09, 0x50, // Usage (SpeedDial) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 0x09, 0x52, // Usage (RecallNumber) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 0x09, 0x51, // Usage (StoreNumber) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 0x09, 0x53, // Usage (PhoneDirectory) 0x81, 0x02, // Input (Data,Value,Relative,Bit Field) 
 0xC0 // End Collection }; 
 
 The Consumer usage worked well. (see this example: https://devzone.nordicsemi.com/f/nordic-q-a/35542/multimedia-buttons-example-connection-issue ) 
 
 But the telephony usage dosent work? Have you got an idea? (NRF52832, SDK15, modified Keyboard example ) 
 
 Regards Taner

Kenneth · Accepted Answer

I believe this is a limitation in iOS, they want you to use ANCS instead: 
 https://devzone.nordicsemi.com/f/nordic-q-a/22226/how-to-answer-incomming-call-in-ios-use-ble-hid

HID Telephony Usage on ios

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