When I record a video on the iPhone 5 with the latest iOS, there is no sound when I playback, just hissing and static.
I can record and playback voice memos, use FaceTime and the telephone, all with no issues.
If you have a screen protector on the back either take it off or just cut it shorter at the top - the screen protector was covering my video mic hole. Its between the camera hole and the flash.
also sometimes with the screen protectors sometimes crumbs and stuff get stuck in them, try cleaning around where the mic is on the back next to the camera. its a little hole.
Honestly, if there is no case or screen protector on the thing, restore as new. If it persists, the iPhone needs to be replaced.
Super handy article btw:
I am also having the same problem. Could you please let me know the procedure
The first response worked for me right away on one of my phones (I have two). On the second phone, there was no problem with the mic even though the protector was covering it - strange...
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