How stupid of me, it says it below, you just need to click on an arrow to expand it thats all

Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libsystem_kernel.dylib 0x1da57effc __pthread_kill + 8 1 libsystem_pthread.dylib 0x1fc97e680 pthread_kill + 267 2 libsystem_c.dylib 0x19a587c24 __abort + 135 3 libsystem_c.dylib 0x19a587b9c abort + 191 4 libc++abi.dylib 0x1fc8ab660 abort_message + 131 5 libc++abi.dylib 0x1fc89b62c demangling_terminate_handler() + 347 6 libobjc.A.dylib 0x18a952d34 _objc_terminate() + 143 7 AppName 0x1042eb73c 0x10401c000 + 2946876 8 libc++abi.dylib 0x1fc8aaa24 std::__terminate(void (*)()) + 15 9 libc++abi.dylib 0x1fc8aa9c8 std::terminate() + 55 10 libdispatch.dylib 0x19a4cf314 _dispatch_client_callout + 39 11 libdispatch.dylib 0x19a4d2d48 _dispatch_block_invoke_direct + 283 12 FrontBoardServices 0x1ab071520 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 51 13 FrontBoardServices 0x1ab0714a0 -[FBSMainRunLoopSerialQueue _targetQueue_performNextIfPossible] + 239 14 FrontBoardServices 0x1ab071378 -[FBSMainRunLoopSerialQueue _performNextFromRunLoopSource] + 27 15 CoreFoundation 0x19256d31c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 27 16 CoreFoundation 0x19256c598 __CFRunLoopDoSource0 + 175 17 CoreFoundation 0x19256adac __CFRunLoopDoSources0 + 339 18 CoreFoundation 0x192569a88 __CFRunLoopRun + 827 19 CoreFoundation 0x192569668 CFRunLoopRunSpecific + 607 20 GraphicsServices 0x1d648f5ec GSEventRunModal + 163 21 UIKitCore 0x1949850d4 -[UIApplication _run] + 887 22 UIKitCore 0x194984710 UIApplicationMain + 339 23 AppName 0x10402bba8 0x10401c000 + 64424 24 dyld 0x1b5be6d44 start + 2103 Binary Images: 0x10542c000 - 0x10543ffff GAXClient arm64e <353bdba9434d3c5b8a82de8e5e74d5a2> /System/Library/AccessibilityBundles/GAXClient.bundle/GAXClient 0x105574000 - 0x10557ffff libobjc-trampolines.dylib arm64e <004cd10c9ab53df6b6afa18ad3e128c8> /private/preboot/Cryptexes/OS/usr/lib/libobjc-trampolines.dylib 0x105ec0000 - 0x106047fff Localytics arm64 <57f63126fd363ca8ad56e45fb98aa6bd> /private/var/containers/Bundle/Application/4C76D1A7-8928-4DF0-88C7-BD010288065A/AppName.app/Frameworks/Localytics.framework/Localytics 0x1064dc000 - 0x1067b7fff hermes arm64 <f7fb66253d503d7f8dc7a13c98af70b5> /private/var/containers/Bundle/Application/4C76D1A7-8928-4DF0-88C7-BD010288065A/AppName.app/Frameworks/hermes.framework/hermes 0x1054c4000 - 0x1054d3fff VZWAuthentication arm64 <ce6c158ef799336887607ad8d6570fa3> /private/var/containers/Bundle/Application/4C76D1A7-8928-4DF0-88C7-BD010288065A/AppName.app/Frameworks/AuthenticationFramework.framework/AuthFramework 0x10401c000 - 0x104ecffff AppName arm64 <90f94d4853e93f61ad0b346331cc683f> /private/var/containers/Bundle/Application/4C76D1A7-8928-4DF0-88C7-BD010288065A/AppName.app/AppName 0x1da575000 - 0x1da5adfef libsystem_kernel.dylib arm64e <36e0966de3773b848f140f9f9457883b> /usr/lib/system/libsystem_kernel.dylib 0x1fc979000 - 0x1fc984ff3 libsystem_pthread.dylib arm64e <401a83f2bf5a302886a14fbee2c12777> /usr/lib/system/libsystem_pthread.dylib 0x19a512000 - 0x19a58fff3 libsystem_c.dylib arm64e <4f87531c494b3bc980b2488da8a939c2> /usr/lib/system/libsystem_c.dylib 0x1fc89a000 - 0x1fc8b1fff libc++abi.dylib arm64e <36326474e3b532408985f554caa59001> /usr/lib/libc++abi.dylib 0x18a924000 - 0x18a971f00 libobjc.A.dylib arm64e <4af3b26f95f53a0cbe43ddd978e6bc2f> /usr/lib/libobjc.A.dylib 0x19a4cb000 - 0x19a511fff libdispatch.dylib arm64e <584bc1890c3438fd85af5549557a0477> /usr/lib/system/libdispatch.dylib 0x1ab067000 - 0x1ab12afff FrontBoardServices arm64e <aa4b67f162713df5abb5af16d156d636> /System/Library/PrivateFrameworks/FrontBoardServices.framework/FrontBoardServices 0x192536000 - 0x192a62fff CoreFoundation arm64e <bcc5f0ee1e5d30968d7090e2dc70bb2e> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 0x1d648c000 - 0x1d6494fff GraphicsServices arm64e <4ce552d027b0384dab489f0291e6f5b3> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices 0x194758000 - 0x19621afff UIKitCore arm64e <e7f0ae8eca1b357da26de6ef1e13a11b> /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore 0x1b5be1000 - 0x1b5c6811f dyld arm64e <f51894e0fd563e7cb3cf89c2cd2fd103> /usr/lib/dyld 0x0 - 0xffffffffffffffff ??? unknown-arch <00000000000000000000000000000000> ??? 0x1fc8cf000 - 0x1fc8d5fe7 libsystem_platform.dylib arm64e <844fd362557831dbb9d313a46ba1ead6> /usr/lib/system/libsystem_platform.dylib 0x1914d4000 - 0x19203bfff Foundation arm64e <f69d66c48b9739a180ea9bcdda941dc0> /System/Library/Frameworks/Foundation.framework/Foundation 0x1fc9bc000 - 0x1fca00fff libxpc.dylib arm64e <ddbc8304de693bb0aeced42e5800ae9a> /usr/lib/system/libxpc.dylib 0x192a63000 - 0x193603fff Network arm64e <82c70443e2e03451a6a20358abb4ac27> /System/Library/Frameworks/Network.framework/Network 0x19d508000 - 0x19d590ffb SystemConfiguration arm64e <148f139f7d4b34b3803ffef400d401cd> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration 0x1ff9a3000 - 0x200178ff7 ANECompiler arm64e <aabd194f688c3a319b39a33f814b252b> /System/Library/PrivateFrameworks/ANECompiler.framework/ANECompiler 0x193604000 - 0x1939ddfff CFNetwork arm64e <a915beb89d1c3e88a3141bbead9832ca> /System/Library/Frameworks/CFNetwork.framework/CFNetwork

There’s three parts to this: ring indication OS integration VoIP transport Are there actually 4 parts involved in implementing VoIP functionality - before the app can receive a ring indication/voip push would it would first need to perform some sort of SIP registration, where the user's sip identify and the iPhone IP address are sent to the SIP Registrar, and which also needs binding to the push token, so the user/phone can be located in order for it to be called. How can the SIP registration be performed, is there any Apple API for such a thing?