Short answer: Open Settings, go to General, then Keyboard, then Keyboards. Tap the keyboard you added and turn on Allow Full Access, then confirm the prompt. Full Access lets the keyboard use the network, which is required for voice dictation, autocorrect sync, and other connected features.
If you have just installed a third-party keyboard on your iPhone, there is one switch standing between a half-working keyboard and a fully working one: Allow Full Access. It is the step people get stuck on most often, partly because the toggle is buried two menus deep and partly because iOS shows a slightly alarming warning when you turn it on. This guide explains exactly how to enable it, what it actually does (and does not do), whether it is safe, and how to fix the common problem where the toggle appears greyed out and refuses to turn on.
Voice keyboards in particular cannot work without it. A keyboard that records your voice and turns it into text has to send that audio somewhere to be transcribed, and iOS blocks all network access for keyboards until you grant Full Access. So if you installed a microphone keyboard and the mic button is missing, greyed out, or does nothing when tapped, this is almost certainly the reason.
What Full Access actually means on iPhone
Every third-party keyboard on iOS runs inside a tightly restricted sandbox. By default, Apple gives keyboards a deliberately small set of powers. A keyboard with the default permissions can read the keys you tap and insert text, and that is essentially it. Crucially, in its default state a keyboard cannot reach the internet at all. No network requests, no cloud services, no syncing.
Turning on Allow Full Access lifts that restriction. With Full Access granted, the keyboard extension is permitted to:
- Use the network. This is the big one. It is what allows a keyboard to send audio out for transcription, fetch translations, sync your personal dictionary across devices, or download improved language models.
- Talk to its companion app. The keyboard can share data with the main app you installed from the App Store, which is how settings, custom words, and your usage stay consistent between the two.
- Access shared device resources that the sandboxed default mode walls off, such as certain shared containers the app uses for configuration.
The reason iOS makes you opt in with a warning is that, in theory, a keyboard with Full Access could transmit what you type. Apple states this plainly in the confirmation dialog: Full Access allows the developer of the keyboard to transmit anything you type, including things you have previously typed. That sounds scary, and it is worth taking seriously, but it is also worth understanding precisely. The permission is a capability, not an action. It means the keyboard can use the network. Whether it actually sends your keystrokes anywhere depends entirely on how the keyboard is built and what the company behind it chooses to do. We will come back to how to judge that.
Why a voice keyboard needs Full Access
A normal keyboard with no network needs does not require Full Access to type letters. But a voice keyboard is a different kind of tool. When you tap the microphone and speak, the keyboard captures audio and runs it through a transcription engine to produce text. That transcription needs network access to reach the processing that turns speech into accurate, punctuated sentences in real time.
This is why, with Full Access off, a microphone keyboard typically shows one of three symptoms: the mic button is hidden entirely, the mic button is visible but greyed out, or the mic button is tappable but nothing happens (or you get a "permission needed" message). All three trace back to the same missing switch. If you are seeing any of these, the fix below resolves it. We cover the missing-button case in more depth in our guide on why the dictation mic button goes missing on iPhone.
It is the same reason a built-in iPhone keyboard with a microphone can dictate so fluidly: the microphone is wired directly into the keyboard layout, and once Full Access is on, speech flows to text in any app where you can type.
How to enable Full Access: step by step
Here is the exact path. It takes under a minute.
- Open the Settings app.
- Tap General.
- Tap Keyboard.
- Tap Keyboards (the first row, which shows how many keyboards you have added).
- Tap the name of the keyboard you want to enable. You will see a screen with a single toggle.
- Turn on Allow Full Access.
- A dialog appears warning you about what Full Access permits. Tap Allow to confirm.
That is it. The toggle turns green and the keyboard's connected features come to life immediately. You do not usually need to restart your phone, though if a feature still seems stuck, a quick restart never hurts.
There is a second route that some people find faster. Open Settings, scroll down to the keyboard's app in the alphabetical app list near the bottom, tap it, and you will often find a Keyboards row with the same Allow Full Access toggle inside. Both paths flip the same switch.
The toggle is greyed out or won't turn on
This is the single most common snag, and it almost always has the same cause: you have not actually added the keyboard yet. iOS will not let you grant Full Access to a keyboard that is not in your active keyboard list. Adding the app from the App Store is only step one; you also have to add its keyboard.
To add the keyboard so the toggle becomes available:
- Go to Settings → General → Keyboard → Keyboards.
- Tap Add New Keyboard…
- Under the "Third-Party Keyboards" heading, tap the keyboard you installed.
- Now tap that keyboard's name again from the list and the Allow Full Access toggle will be active.
A few other reasons the toggle can resist:
- Screen Time or content restrictions. If Screen Time is on, restrictions can block keyboard changes. Check Settings → Screen Time → Content & Privacy Restrictions and make sure keyboard or app changes are allowed.
- A Mobile Device Management profile. Work or school phones sometimes carry an MDM profile that disables third-party keyboards entirely. If your iPhone is managed, the toggle may be locked by policy and you will need your administrator to allow it.
- A momentary glitch. Rarely the toggle just hangs. Force-quitting Settings, or restarting the phone, clears it. If the keyboard still will not switch over after that, our walkthrough on when the iPhone keyboard won't switch to dictation covers the deeper fixes.
Is enabling Full Access safe?
This is the question that matters most, and it deserves a real answer rather than a blanket "yes" or "no." Full Access is safe when you trust the keyboard you are granting it to. The permission itself is not malicious; it is a standard, necessary capability for any keyboard that does anything online. The risk is entirely about who is on the other end.
Here is a practical way to evaluate any keyboard before you grant Full Access:
- Read the privacy policy. A trustworthy company will tell you in plain language what it collects, what it does with your audio and text, and what it stores. Vague or missing policies are a red flag.
- Check what the keyboard needs the network for. A voice keyboard needs network access to transcribe speech. That is a legitimate, obvious reason. Be more skeptical of a basic typing keyboard that demands Full Access without a clear functional reason.
- Look at who makes it. Established apps with a real company behind them, a support address, and an App Store track record are far safer than anonymous one-off keyboards.
- Watch the App Store privacy labels. Apple requires every app to declare what data it collects and whether it is linked to you. Read those before installing.
It is also reassuring to know what Full Access does not expose. iOS deliberately does not load third-party keyboards in secure text fields. When you tap a password field, an Apple Pay field, or other sensitive inputs, the system silently swaps your custom keyboard out for the standard Apple keyboard. So even a keyboard with Full Access never sees your passwords or payment details. That is a hard guarantee built into iOS, not a promise from the keyboard maker.
How Voice Keyboard Pro handles Full Access and your privacy
Voice Keyboard Pro asks for Full Access for exactly one reason: the microphone keyboard sends your audio to be transcribed and the result back to your cursor, and that round trip needs network access. There is no other use for the permission in the app.
On privacy, our position is straightforward. The transcription happens through Voice Keyboard Pro's advanced AI transcription, and our servers do not store the contents of what you dictate. As of our 2026 privacy update, the only thing the server keeps is operational pings, the lightweight signals needed to keep the service running. We do not retain your audio, and we do not keep the transcript text on our servers. Your words go to text and stay with you. That is the standard we hold ourselves to, and it is the standard you should expect from any keyboard you grant Full Access to.
If you are weighing whether a third-party keyboard is worth it at all, our broader look at the third-party voice keyboard experience on iPhone walks through the trade-offs, and our roundup of the best voice keyboards for iPhone compares the options.
After you enable it: getting the most from voice typing
Once Full Access is on and the keyboard is switched in, dictation works in essentially any app that accepts text. Open Messages, Mail, Notes, a browser, a social app, a work tool, and the keyboard's microphone button is right there. Tap it, speak naturally, and your words appear as text. Speech runs at a natural 130 to 150 words per minute, which is two to three times faster than even a quick thumb-typist managing 40 words per minute on a phone keyboard.
A few tips to make the experience smoother:
- Speak in complete thoughts. Natural phrasing transcribes more accurately than clipped, word-by-word delivery.
- Say your punctuation when you want it precise. Saying "period," "comma," or "new line" gives you exact control over formatting.
- Use a personal dictionary for names and jargon. Words the engine would not normally know (a product name, a colleague's surname, an acronym) can be added so they come out right every time.
- Switch to the keyboard before you tap the field if you find the mic button is not showing, then tap and hold the globe icon to pick it.
If you ever want to dictate across more places, our guide to dictating on iPhone in any app shows how the same keyboard carries your voice into apps that have no dictation of their own.
Turning Full Access off again
Granting Full Access is not permanent. You can revoke it at any time without deleting the keyboard. Go back to Settings → General → Keyboard → Keyboards, tap the keyboard, and switch Allow Full Access off. The keyboard remains installed, but its connected features (including voice dictation) stop working until you turn the permission back on. If you want to remove the keyboard entirely, swipe left on it in the Keyboards list and tap Delete, or tap Edit and remove it there.
The bottom line
Enabling Full Access on iPhone is a one-minute task: Settings, General, Keyboard, Keyboards, tap your keyboard, turn on Allow Full Access, confirm. If the toggle is greyed out, you have not added the keyboard to your active list yet, so add it first. The permission is necessary for any voice keyboard because transcription needs the network, and it is safe as long as you trust the company behind the keyboard and they are clear about what they do with your data.
For a voice keyboard, Full Access is the difference between a layout that can only type letters and one that can turn everything you say into text. Voice Keyboard Pro has a free tier, so once Full Access is on you can start dictating in your next message and feel the difference for yourself.