Whomever sold you the hearing aids would be able to tell you if you have telecoils. The fitter has to activate them as they are not automatically activated. Far too many fitters don't bother to do that, or to even tell people about them. Nine states now have legislation that requires this disclosure by people who sell hearing aids. Others are working on it. It's a shame that people with hearing loss have to depend on each other to advocate for such.

Always get the telecoil. I know of no reason not to and a whole bunch of reasons to get it.