Updated to 8.3 Siri stoped working. No mic input.

I Have the exact same problem. Mic doesn't work on incoming or outgoing calls but works with every other app. Only happened right after update. Tried resetting, erasing everything and restoring from icloud and nothing works... Last update scrapped my phone now I have to buy a new one...

I'm having the same problem. iPhone 6 updated to 8.3. Now unless i have the headphones in, Siri doesn't hear me and people can't hear me using the speakerphone. It's intermittent, but occurs more often than not.