- Buy a cell phone that has M3 or M4 and T3 or T4 ratings
- The "M" rating represent microphone interference potential
- The "T" rating represents the telecoil coupling capability of the cell phone
- Purchase a hearing instrument and cell phone combination with an "M" score that adds up to "5."
- This will help ensure that the cell phone will not interfere with the programming of the hearing aids.
- Purchase a cell phone with CDMA transmission technology.
- Cell phones with this type of transmission technology will have a M3 or M4 rating.
- Cell phones equipped with GSM transmission technology are limited to a M3 rating.
For BHI's publication entitled "How to Buy a Cell Phone When You Have a Hearing Loss" (the article from which this information is taken), click here.
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