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FCC mandates all mobile phones in the US to be compatible with hearing aids
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
This wasn’t a thing already? We’ve had cell phones a long time.
edit: punctuation
I recall it being required in cars. IIRC all cars after 2012 needed to have bluetooth and hands free.
Perhaps phones just operated in proxy to that