![fcc id bcg-e3085a fcc id bcg-e3085a](https://photos5.appleinsider.com/price_guide/apple-watch-series-3-cellular-product-page.png)
M4 is the better/higher of the two ratings. Although prices for the handsets may vary, all these handsets offer the same level of functionality by providing each end user with access to voice and text services. M-Ratings: Wireless devices rated M3 or M4 meet FCC requirements and are likely to generate less interference to hearing devices than wireless devices that are not labeled. All these handsets are rated at M3, T3 or better. A1660: The iPhone 7 A1660 is considered the global phone as it is compatible with both GSM and CDMA networks.This model is available in the United States, Puerto Rico, Hong Kong and China. Quality One Wireless currently offers the following hearing aid-compatible handsets/phones. The 4.7-inch iPhone 7 comes in 3 model numbers, A1660, A1778, A1779, and A1780. The higher the "M" or "T" rating, the less likely the hearing aid user will experience interference while using a cell phone. Those that are considered passing (those with a rating of "good" or "excellent") for use with hearing aids set in telecoil mode are assigned a rating of T3 or T4. THIS IS THE NEW VERSION OF QRESEAR.CH New provider & new technology for better search results and performance. Cell phones using inductive coupling technology are tested for telecoil coupling capability according to the ANSI C63.19 standard.
![fcc id bcg-e3085a fcc id bcg-e3085a](https://i5.walmartimages.com/asr/b8fb7a1f-f7d4-4466-852f-4c7570de737f_1.e55710fa5308fc971fb1216066268b87.jpeg)
Those that are considered passing (those with a rating of "good" or "excellent") for use with hearing aids set in microphone mode are assigned a rating of M3 or M4. FCC ID Internal Name Identifier Case Material Finish Case Size Model Apple Watch (1st generation) A1553 Bootrom 2098.0.0.2. Cell phones using acoustic coupling technology are tested for reduced RF emissions according to the ANSI C63.19 standard. Cell phones are rated according to their hearing aid compatibility in terms of RF transmissions or telecoiling coupling capability.