If you have an iPhone 7 or 7 Plus, you most likely are facing an iPhone Audio IC issue.
The way to test is to open Voice Memo and try recording if the app shows “Recording Failed” or “No Audio Devices” error then the Audio IC on your iPhone is in need of some attention.
- No microphon or no speaker
- grayed out speaker on a call screen
- Voice Memo app not recording
- “Recording Failed” error
- “No audio devices found” error
- a long 5-10 minutes boot time
- Static noises during calls
How do We Fix this issue?
First, we remove the Audio IC using a hot air.
Then we re-create the broken pads under the ic by making a micro jumper and the most common trace pad is “C12” which we re-create even if not broken to avoid future audio defects.
Then we reball the Audio IC chip if still intact or use a brand new chip & place it back down on the logicboard using a hot air.
And This will Do it for this audio problem!
Here is one of many articles that have been released on iPhone 7 and iPhone 7+ called Loop or Audio Disease.