iPhone Hearing Aid Compatibility: Ratings and the Switch

When people say an iPhone is hearing aid compatible, they usually mean the FCC rating. Every iPhone Apple still lists meets it. The part worth your time is the Hearing Aid Compatibility switch in Settings > Accessibility > Hearing Devices, and knowing which kind of hearing aid it’s actually for.

This page sits with our other iPhone hearing tools guides.

Three things “compatible” can mean

The phrase gets used for three different questions, and the answer to one doesn’t settle the others.

1. Does the phone meet the FCC rules? This is the rating printed in Apple’s table. It’s about interference and how a phone held to your ear works with a hearing aid. Every recent iPhone passes.
2. Can my hearing aids stream from it? That’s a Bluetooth question, answered by Apple’s list of Made for iPhone hearing devices. If yours are on it, our guide to pairing hearing aids to an iPhone covers setup and the asterisk that decides hands-free calls.
3. What does the switch in Settings do? It’s a phone setting, and Apple ties it to hearing aids in telecoil mode.

The first and third are this page. When someone tells you a phone “works with hearing aids”, it’s worth asking which of the three they checked.

What I could and couldn’t check. I read Apple’s support article “About Hearing Aid Compatibility (HAC) requirements for iPhone”, Apple’s iPhone User Guide page “Use hearing devices with iPhone” (iOS 27), and the FCC’s notice DA 26-555 of June 5, 2026, all in October 2026. I didn’t test a hearing aid with an iPhone for this page, in acoustic, telecoil or streaming mode, so I can’t tell you how the switch sounds with any particular model. Hearing aid settings like M and T modes come from your hearing aid’s manual or your audiologist.

iOS version checked: iOS 27, October 2026 (Apple’s documentation, not a phone I used).

If you don’t own hearing aids yet, two points from the FDA before any of this matters. Over-the-counter hearing aids are for adults 18 and over with perceived mild to moderate hearing loss. And the FDA says to see a doctor first if your ear is injured or an unusual shape, if you’ve had blood, pus or fluid from it in the past six months, if it hurts, if there’s a lot of earwax or something in it, if you get dizzy, if your hearing changed suddenly or gets worse then better, or if you have worse hearing or ringing in only one ear (FDA). I build audio software, not hearing care.

What M3 and T4 mean

Older iPhones carry two ratings from the 2011 version of the ANSI standard the FCC uses. Apple’s HAC page defines them:

• M is for acoustic coupling. The hearing aid picks up the phone’s sound through its own microphones, and the rating measures how little radio interference the phone adds.
• T is for telecoil coupling. A telecoil is a small magnetic coil that takes in sound through the hearing aid’s circuitry instead of its microphone (NIDCD). The rating measures how well the phone feeds it.

Both run from 1 to 4, and 4 is the most compatible. A phone counts as hearing aid compatible at M3 or M4 and T3 or T4. Every iPhone in Apple’s table from iPhone 6 through iPhone 15 Pro Max, the SE models included, is rated M3, T4.

So there’s nothing to compare between those models. If you were hoping an iPhone 13 rates better than an iPhone 11, it doesn’t.

Why iPhone 16 and later don’t show M or T

Look up an iPhone 16, 17, Air or 18 Pro in Apple’s table and the M and T columns are gone. Apple’s note says why: the 2019 version of the standard “does not use this rating system.”

Those models are listed as compliant through FCC waiver DA 23-914, a 2023 order that lets makers keep certifying phones under the 2019 standard while a new volume-control test is finished. In place of M and T, Apple shows:

• T-coil support. It reads Yes for every model from iPhone 16 onward.
• Conversational gain, with and without hearing aids. It’s a volume measurement from that standard. An iPhone 17 (model A3258) reads 12 dB and 17 dB.
• Frequency bands that weren’t tested. For many models that’s mmWave and 6GHz.

That last column is the one I’d read. Apple says some newer wireless technologies in a phone may not have been tested with hearing aids yet. Its advice is to try the phone’s features in different places with your hearing aid or cochlear implant and listen for interfering noise. A rating can’t tell you how one particular pair behaves, and Apple says plainly that ratings “aren’t a guarantee.”

Should you turn on Hearing Aid Compatibility?

Turn it on if you hold your iPhone to a hearing aid set to telecoil mode. That’s the case Apple names. For hearing aids that stream calls straight from the iPhone, I’d leave it alone and look elsewhere when something sounds wrong.

To turn it on:

1. Open Settings and tap Accessibility.
2. Tap Hearing Devices.
3. Turn on Hearing Aid Compatibility.

Apple’s HAC page says that on current models the switch “modifies the phone’s acoustic settings to improve compatibility with hearing aids set in ‘T’ or telecoil mode.” The iOS 27 guide puts it more loosely: it “may reduce interference and improve audio quality with some hearing aid models.” Neither says it changes Bluetooth streaming.

That fits what I see building audio apps. iOS sends a call to one output at a time: the earpiece, the speaker, or a Bluetooth device. A streamed call doesn’t reach your hearing aids through the earpiece at all, so a setting described in terms of the earpiece and telecoil isn’t where I’d start. For streaming problems, the pairing guide has the fixes in order.

Apple lists no downside for the switch on current iPhones. The old Hearing Aid Mode on iPhone 6 and earlier did cost something: it lowered the radio’s power on one band and could weaken 2G coverage. The modern switch is one tap to undo, so test it like this:

• Set your hearing aid to M (acoustic) mode first. Apple says iPhones and hearing aids generally work best together that way. Hold the phone the way you normally would.
• If speech sounds thin or buzzy, move the earpiece slightly above your ear. Apple suggests this for hearing aids with microphones behind the ear.
• Still not right? Switch the hearing aid to T mode, turn on Hearing Aid Compatibility, and call the same person again. Keep whichever setup sounds clearer.

What changes on December 15, 2026

The FCC’s June 2026 notice (DA 26-555) sets the date. From December 15, 2026, handset makers “may no longer offer non-hearing aid compatible handset models” in the US. Every model they sell has to pass.

The detail underneath matters more. Of the models a maker offers, 85% must meet acoustic and telecoil coupling. The other 15% must meet acoustic and Bluetooth coupling, and may support telecoil as well. New models also have to meet a volume requirement, either the 2019 standard’s or a temporary one set to expire September 29, 2027.

Read that plainly: “hearing aid compatible” is about to be on every phone, so the label stops helping you choose. If you rely on telecoil, check that the exact model supports it. Apple’s table shows T-coil support for every current iPhone, and that’s the column to look at before you upgrade.

Carriers get longer. The transition ends June 14, 2027 for nationwide carriers and June 13, 2028 for everyone else.

Try the phone with your own hearing aids

Everything above narrows it down. It can’t replace ten minutes with your own hearing aids and the phone in your hand.

The NIDCD’s advice is to take your cell phone with you when you’re fitted for new hearing aids, to check they work together. Apple says the same from the other side: use a particular hearing aid with a particular phone before you buy. If you’re upgrading the phone, ask the store about returns before you leave, so a bad pairing costs you a trip rather than the price of the phone.

If your hearing aids aren’t Made for iPhone and you want streaming, Apple mentions a third route. Some makers sell “bridge” accessories that take Bluetooth audio from the iPhone and pass it on to the hearing aids using their own wireless link. Your audiologist or the maker will know if one exists for your model. Venue sound systems are a separate topic, covered in our guide to assistive listening devices, and if you’re comparing makers’ companion apps, see hearing aid app for iPhone.

If you don’t wear hearing aids

None of the settings above do anything without a hearing aid. If what you need is help following a conversation tonight, that’s a different tool.

Clarive is an iPhone app I build, for iPhones running iOS 26 or later. It doesn’t connect to hearing aids, it doesn’t work on phone calls, and it isn’t a hearing aid or a replacement for one. It uses the iPhone’s microphone to amplify sound around you and plays it through any headphones that connect to your iPhone, including AirPods and wired EarPods, and it can show live captions on screen. It’s free to download, with a limited free tier. If you already wear hearing aids, it probably isn’t what you need.

Get Clarive on the App Store if that sounds like your situation. And if you’re finding it harder to hear than you used to, tell a doctor or audiologist. An app can’t tell you why.