I just discovered this, so figured I'd share.
I connected my Eris headphone jack to my car stereo's aux input jack to listen to my music in the car. When I made a phone call, the call's audio came out of the car stereo speakers! I kept the phone on my lap, and the microphone picked up everything I said clearly. Sort of a poor-man's version of hands-free speaker phone in the car.
I suppose you could to this at home with a radio or something to make speaker phone calls without using the built-in speaker in the Eris.
I connected my Eris headphone jack to my car stereo's aux input jack to listen to my music in the car. When I made a phone call, the call's audio came out of the car stereo speakers! I kept the phone on my lap, and the microphone picked up everything I said clearly. Sort of a poor-man's version of hands-free speaker phone in the car.
I suppose you could to this at home with a radio or something to make speaker phone calls without using the built-in speaker in the Eris.