From what I understand the lack of use (in the US) is largely due to carriers being reluctant to enable direct FM receivers on the phones on their network. Can’

From what I understand the lack of use (in the US) is largely due to carriers being reluctant to enable direct FM receivers on the phones on their network. Can’t charge data when the customer can get free FM. Discontinuation may also be due to the requirement of using headphones as the receiver antenna.