The microphone is held in place by strong adhesive to the bottom edge of the phone.

Don't pry against the battery, it could catch fire if damaged.

Insert the flat end of a spudger under the top edge of the microphone and pry up until you can grab it with your fingers.

If the microphone does not budge, try adding a little bit of heat using an iOpener, hair dryer, or heat gun. Only heat it it's slightly hot to touch, as the battery is susceptible to heat damage.

Peel the microphone from the adhesive securing it to the frame and remove it.

During reassembly, if your replacement part doesn't include adhesive, use thin, double-sided tape instead. Make sure it doesn't block the sound cutouts during installation.