The thing was that MFI hearing aids caught the imagination of the broader tech community and users. They are popular hearing solutions; in fact, they seem to have seeped into the wider consciousness. Inevitably, the other hearing aid manufacturers began to take notice. Oticon, Signia and Widex have all launched their own iPhone hearing aids. Phonak also introduced their very own system, but it is different from everyone else. The full range of brands with MFI hearing aids are: Philips, Oticon, Bernafon, Widex, Resound, Starkey, Signia, Phonak, Unitron