diesigrl, you do NOT have to have telecoil in the aids for Acoustic Phone to work! It appears to be a program that uses the phone mic to literally transmit the caller’s voice to BOTH ears at once - stereophonically. It’s NOT streaming, and you don’t hear the caller’s voice inside your ears.
FUNNY ASIDE that may impact your (and others’) use of Acoustic Phone. If you have multiple handsets (like you may have in an office or even at home - think Panasonic phone sets with the base unit in the living room and the handsets sprinkled throughout the house). VERY IMPORTANT: you have to actually “answer” the phone and only then, hit the button on your aids to put them into Acoustic Phone.
Yesterday, hubs and I tested out all kinds of situations with Acoustic Phone. If I try to put my aids into Acoustic Phone BEFORE answering the landline, it will only try to connect to my cell phone (via streaming). Therefore, you have to first engage the landline handset (ie, turn it ON or pick up the receiver) first, and only then, put your aids into Acoustic Phone. I think that’s why many here have Acoustic Phone as the very first program after default for easy access.
The only hassle for you would be that you’d want to return to the default program after each phone call. Maybe not optimal, but at least you don’t have to worry about dropping calls or the echo-factor with cell phones and T-MOBILE - which, I personally think is the most lame service out there.