Yes I have t coils and I taught my Audiologists more things that Tcoils does . It helps sometimes with tv and acts like fm recievers somewhat . Folks are getting new aids with Bluetooth snd not tcoils. You need both. Bluetooth does not help with loops which allowed you in Amtrak stations to hear direct to your aids. My over aids like Nano does not have tcoils. Bluetooth is available in some over the counter aids but it’s seems I did not get those. Supposedly I have the most powerful ones but it is adequate for me. I cannot hear on the phone at all nowadays . It’s jamming me up at one dr office whose staff in years past were good. Now not.