Are Caption Phones Illegal? What the FCC Rules Say
Short answer
No. Captioned telephone service is legal and runs under FCC rules. The rule people hit is narrower: only registered users with hearing loss may use a captioned phone with the captions on. Each device carries a label saying so, and registering means certifying your hearing loss in writing, under penalty of perjury.
Key takeaways
- The service is legal. What federal rules prohibit is someone who isn't a registered user using the captions on a registered user's phone.
- That's the warning on the device. The FCC's rule requires the label, and the same section bars anyone from using the captions without being registered.
- Registering means giving your name, date of birth, last four digits of your Social Security number, address and phone number, plus a signed certification that you have hearing loss.
- The captions on a registered line are paid for through a federal program, which is why the rules are strict about who qualifies.
- On an iPhone 11 or later, Apple's Live Captions can caption phone calls through a setting on the phone, with no provider involved.
Caption phones are legal. What people run into is a warning sticker, and the rule behind it is narrower than “illegal” suggests: federal rules say only registered users with hearing loss may use a captioned phone with the captions turned on.
I read the actual rule text for this, 47 CFR 64.604 and 64.611, in October 2026, because the pages that rank describe the service, not the rule behind the sticker. If the conversation you can’t follow is in the room rather than on the phone, that’s a different tool. Clarive does that, and it doesn’t touch calls; more on why near the end. More on captions generally is in our live captions guides.
Where the word “illegal” comes from
A captioned phone shows what the other person says as text on its screen while you talk and listen as usual. In IP CTS the captions arrive over the internet, and a live communications assistant can generate them. The warning comes from the device itself. The FCC’s rules for IP captioned telephone service (IP CTS) require providers to put a label on the face of the equipment. The text reads: “FEDERAL LAW PROHIBITS ANYONE BUT REGISTERED USERS WITH HEARING LOSS FROM USING THIS DEVICE WITH THE CAPTIONS ON.” Providers’ websites and marketing materials have to carry similar wording.
That label is accurate, and it’s the whole source of the reputation. Read quickly, “federal law prohibits” sounds like the phone itself is the problem. It isn’t. The prohibition is on a person: section 64.604(c)(11) says no one may use IP CTS equipment or software with the captioning on unless they’re registered to use it.
What registering involves
Registration is in 47 CFR 64.611. Before a provider can be paid for your calls, it has to collect your full name, date of birth, the last four digits of your Social Security number, your home address and your phone number.
Then comes a written certification, on a separate form with its own signature, made under penalty of perjury. You’re stating four things:
- You have a hearing loss that makes captioned telephone service necessary.
- You understand the captions come from a live communications assistant who listens to the other party and sends the text to your phone.
- You understand a federal program pays for the captioning of each call.
- You won’t, as far as you’re able, let unregistered people make captioned calls on your registered phone or device.
Depending on how the equipment reached you, a physician, audiologist or other hearing professional may also have to sign a certification. The rule text lays out who qualifies and requires that the professional have no business or family tie to the provider. I’m describing what the regulation says, not telling you whether you qualify. That’s a question for the provider, or for your audiologist.
Why people think the rules are harsh
The registration rules came out of a 2013 FCC order titled Misuse of Internet Protocol Captioned Telephone Service, which is exactly what it sounds like: a response to people using the service who weren’t supposed to. It also set a captions-off default and a rule about equipment costing under $75.
Two of those didn’t survive. According to the Federal Register notice, the D.C. Circuit stayed the $75 equipment rule in December 2013 and vacated it, along with the captions-off default, in June 2014. The registration and certification requirements that remained are the ones above.
I also found a 2025 FCC proposal on moving users off older captioned-telephone technology toward IP CTS or captions generated on smart devices. I couldn’t confirm it was finalized, so I’m not treating it as settled. If this matters to you, check the FCC’s Disability Rights Office pages for where it stands.
What to do if you don’t qualify, or don’t want the paperwork
Try the phone you already have. Apple’s guide to Live Captions on iPhone says it needs an iPhone 11 or later, and that you turn it on under Settings, Accessibility, Live Captions. It transcribes spoken audio in apps and calls. Our guide to live captions on iPhone covers the setting and its limits.
Two details from that page matter on calls. Under Keep Call Captions you can save captions for 1 Minute or 1 Hour after a call, and if you choose 1 Hour, everyone on the call hears an announcement that the call is being transcribed. And Apple says accuracy varies and shouldn’t be relied on in high-risk or emergency situations.
That last line is the honest limit. A registered captioned-telephone service can use a live person, per the certification text above. Apple’s feature is the phone transcribing, which is quick to try and gets things wrong. I’d start with Apple’s because it costs nothing and needs no paperwork. If calls are still the thing you can’t do, that’s what the registered service exists for.
Where Clarive fits, and where it doesn’t
Clarive is a sound amplification app for iPhone with live captions, built on Apple’s on-device speech recognition, in 40+ languages with automatic language detection. It listens through the iPhone’s microphone, so it captions what’s said in the room. It doesn’t caption the audio of a phone call, which is why it isn’t an answer to this article’s question.
What it does well is the other half of the problem: a family dinner, or someone across a table, with the phone close to whoever is talking. Everything runs on the phone with no account. The apps for hearing loss guide compares the rest.
It’s free to download. The free tier has amplification with no daily limit and 5 live caption sessions a day. Unlimited captions and saved transcripts are on the paid plans, which range from $4.99 to $29.99 depending on billing period, with a lifetime option. It needs an iPhone on iOS 26 or later.
It isn’t a hearing aid, it doesn’t test your hearing, and it can’t replace a captioned-telephone service for calls.
What to do next
If calls are the problem and you want the registered route, ask a provider about registration and what the equipment costs. If you’d rather try something this afternoon, turn on Live Captions on an iPhone 11 or later and make a test call.
Common questions
Are caption phones illegal?
No. Captioned telephone service is a regulated service, and the FCC's rules set out who may use it. What's prohibited is using IP captioned telephone equipment or software with the captions on when you aren't a registered user. The sticker on the device says the same thing, which is where the idea that the phones are illegal usually starts.
Who can use a captioned phone?
A registered user with hearing loss. Under 47 CFR 64.611 the provider collects your name, date of birth, last four digits of your Social Security number, address and phone number, plus a signed certification that your hearing loss makes the service necessary. Depending on how you got the equipment, a physician, audiologist or other hearing professional may also have to certify.
Can a family member use my captioned phone?
Not with the captions on, if they aren't registered themselves. When you certify, you agree to the best of your ability not to let unregistered people make captioned calls on your registered phone or device. A relative with typical hearing can use the phone as a plain phone, with the captions off.
How much does a caption phone cost, and is there a free one?
The captioning itself is funded through a federal program, not billed to the user per call. The certification you sign says so. The rule text also assumes providers can supply equipment at no charge or for under $75, because it sets an extra certification step for that case. I haven't verified a current price for any provider, so ask what you'd pay for the phone before you register.
Can an iPhone caption phone calls?
Yes, on an iPhone 11 or later. Turn on Live Captions under Settings, Accessibility, and the phone transcribes call audio on screen. As for a free iPhone program, the free option I can point to is this built-in setting. Apple's guide says accuracy can vary and that it shouldn't be relied on in high-risk or emergency situations. It's a different thing from a registered captioned-telephone service, which can use a live operator.
Written by
Mahipal
iOS product engineer and the developer of Clarive. Writes about iPhone audio, live captions, and making everyday conversations easier to follow.
Clarive is a sound amplification app, not a hearing aid or medical device. It doesn't diagnose or treat hearing loss. If you're having trouble hearing, see an audiologist or your doctor.