I'm havin the same issue:
Dictation in text message = Does not work
Speaking with Siri via activated with Home button = Does not work
Speaking with Siri with "Raise to Speak' = WORKS
Voice Memos = WORKS
Speaker phone on call = WORKS
Voice control instead of Siri = WORKS
I've tried hard reset, settings reset, wiping and reloading backup...nothing. Was hoping 7.1 might offer some respite, but no dice....
I was hoping 7.1 would somehow solve it.
I have same issue on my iphone 5 and found that is H/W issue.
You can try to use front camera to record a video.
If it can't hear your voice I think that is front Mic malfunction.
I think Siri via activate with home button will use front Mic to get your vioce.
Try this way to see if that is H/W problem.
Here is the problem.
For a lot of people, when they update to iOS7, their voice microphone stops working. The speakerphone mic still works, but the voice mic quits working. This problem is especially bad on the iPhone 4.
Apple says this is a hardware issue. However, it seems a little too concidental that so many people (based on these forums and other sites) are immediately having microphone trouble after the software update.
On the other hand, perhaps the voice mics on a lot of phones (iphone 4 and other models) are simply going out. This would seem to be a hardware problem.
In my case, I feel like the software update was responsible for the mic going out. It worked perfectly until after the update. Then, mysteriously, the mic stopped working. Apple would say that this would just coincidence, but others have experienced the same thing.
Either way, the problem seems wide enough that Apple should consider a recall or free replacement in these situations. Either way, there is a big problem with the voice mic going out for a lot of people, and this affects voice call as well as Siri and numerous other functions.
I am having the same issue. There's a lot of responses on this thread .. did anyone find an answer?! I need to use the phone as - you know - a phone..
Unfortunately for me, in addition to the microphone not working, there was a problem of getting stuck in an endless reboot cycle. Basically the phone would cycle through black, logo, black, logo, gray, black. This occured even after a hard reset, complete phone restore, and a firmware update. I tried this all myself at home. Then I took my phone to the Genius Bar and they did the exact same thing. No luck. Phone wouldn't turn on. I later asked them if I could revert back to iOS 7.0 or even iOS 6 because I never have had that problem. They said no.
So long story short, they blamed this on a hardware problem. And attributed the microphone to the same thing. Like everyone else is saying, it seems a little coincidental. But if tapping the waveform gets it to work again, then that's great!
Good luck everyone!
Having same issue. Mic works fine in voice memos, voice control, and raise to speak. Just not when using speakker mic for siri or speakerphone on a call. Went to the Apple store today and of course it was working, tried some resets, stopped working on my way home. Have been playing around with different settings. Still unsure of where the issue lies.
OK, time to throw in my two cents.
Mine in now fixed after I tried almost everything mentioned in this thread.
Scary simple but now seems so obvious (in my case at least).
I know it won't fix everyone's as I'm sure some are iOS and Hardware isses only. Mine was simply sand in the microphone hole.
Just clean these holes thoroughly with a compressed air can and a fine needle. Don't push or pack the dirt or sand in. Be careful. Once I celared out the visible dirt and sand surprise... Siri and front facing video working perfectly!
Hope this helps others.