Google LM386 Datasheet.The LM386N-1, -3, LM386M-1, LM386MM-1 are rated to operate between 4- to 12-Volts.So, yes.
Hello, below I will have a picture of a condenser microphone circuit.
I assume you're connecting the phone's headphone-output?Yes, it's signal-only. You won't damage your phone.That's a mono amplifier so you'll only get the left or right signal unless you build two (not great for music). ...And, don't "short" the phone's left & right outputs together.Hmmmm….. There's no power for the condenser mic and the gain is too low for a microphone signal.