Symbolicate ios Submission Crash Report

Often times we get crash from ios submission report that goes like this
Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 cong2 0x0000000101e78060 0x100bbc000 + 19644512 1 cong2 0x0000000100bcfb84 0x100bbc000 + 80772 2 cong2 0x0000000100bcff28 0x100bbc000 + 81704 3 CoreFoundation 0x00000001854e113c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20 (CFNotificationCenter.c:661) 4 CoreFoundation 0x00000001854e06dc _CFXRegistrationPost + 420 (CFNotificationCenter.c:163) 5 CoreFoundation 0x00000001854e0440 ___CFXNotificationPost_block_invoke + 60 (CFNotificationCenter.c:1060) 6 CoreFoundation 0x000000018555de24 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1408 (CFXNotificationRegistrar.m:163) 7 CoreFoundation 0x0000000185416d60 _CFXNotificationPost + 380 (CFNotificationCenter.