Choosing the Right Phone
Cochlear implant users can follow the same guidance offered to hearing aid users. CTIA --The Wireless Association – has many excellent resources on selecting a cell phone on its website.
The Federal Communications Commission (FCC) defines hearing aid compatibility for wireless devices. Cell phones must be tested to see if they comply with the FCC's definitions.
Cell phones rated M3 or M4 (M stands for microphone) meet FCC requirements and are likely to generate less interference for someone using a cochlear implant. M4 is the better of the two ratings.
Cell phones rated T3 or T4 (T stands for telecoil) meet FCC requirements and are likely to be usable with the telecoil in the cochlear implant sound processor. T4 is the better of the two ratings.
Cell phones rated both M4 and T4 provide the best compatibility with hearing technology. MED-EL's OPUS 2 processors have a built-in telecoil.