HAC and TTY compatible devices

In order to ensure our hearing aid dependent members have access to devices that are best suited to their needs, CREDO Mobile offers a variety of hearing aid compatible (HAC) and teletypewriter (TTY) devices.

HAC devices are divided and rated in two categories, “M” and “T.” Ratings in these categories range from 1 to 4, and the higher the rating, the more compatible the device will be with a range or hearing aids.  

M3 or M4 are less likely to generate interference with hearing devices. Devices rated T3 or T4 are more likely to work well with hearing aids and telecoils.

We currently offer the following HAC and TTY compatible devices:



For more information regarding FCC HAC requirements, visit https://www.fcc.gov/hearing-aid-compatibility-wireless-telephones

For information on the Global Accessibility Reporting Initiative, visit http://gari.info/


Updated on 4/20/2022