Have you ever noticed a strange inscription on your Xiaomi Redmi «TTY» Or you suddenly stop hearing someone while they're calling, even though they're stable? Your smartphone probably accidentally activated a teletype mode, a feature that many users don't even know exists. This technology, inherited from the era of analog phones, is still hidden in the settings of modern gadgets, including the line of Redmi.
In this article, we will explain what is a teletype mode (TTY) In Xiaomi phones, why do you need it in 2026, how do you turn it on (if you need it) and more importantly, how do you turn it off if it interferes with normal calls, and why does it sometimes activate on its own, and what to do if you don't have a sound in your handset after it's turned off. We will also focus on the nuances for specific Redmi models, such as the Note 12 Pro.+, Redmi 10 or POCO X5, Where the path to settings may be different.
What is Teletype Mode (TTY) and Why You Need It
Regime. TTY (Text Telephone is a technology that allows people with hearing or speech impairments to communicate over the phone using text, first developed in the 1960s for analog telephone networks and used with special devices called teletypes, TTY It is a feature of mobile operating systems, including MIUI on Xiaomi smartphones.
In modern phones mode TTY works:
- 📞 Complete. TTY (Full: You and the other person should use TTY-Text is transmitted over a telephone line instead of a voice.
- 🔄 TTY voiced (VCO): You speak and the person answers with text (for people with hearing impairments).
- 💬 TTY hearingly (HCO): You type the text and the interlocutor responds with a voice (for people with speech impairments).
- ⚙️ TTY Software (Software): Emulation TTY No external device (not available on all Redmi models).
In practice, most users of Xiaomi Redmi are faced with the TTY Accidentally, for example, after updating MIUI The function can be activated automatically if the system recognizes the connection of a compatible device (for example, a hearing aid with support). TTY). As a result, during the call, the sound disappears, and a notification about the teletype mode appears on the screen.
⚠️ Note: On Redmi models with MIUI 14+ (For example, Redmi Note 13 Pro mode TTY It may conflict with function HD-voice (VoLTE) if activated TTY The sound is missing in the calls, turn it off first. TTY, Then restart your phone and check your mobile network settings.
How the regime looks TTY Xiaomi Redmi: signs of activation
To find that your Xiaomi Redmi enabled teletype mode, you can on several grounds:
| Sign. | Description | Models where you meet |
|---|---|---|
| Icon TTY status-line | There's a badge in the top panel. TTY Teletype next to the network indicator. | All models with MIUI 12+ |
| No sound in the tube. | You can’t hear the person you’re calling, but the microphone is working. | More often on Redmi. 9/10/Note 11 |
| Notification on call | When you try to call, a pop-up window appears: “Teletype mode is activated.” | POCO X3/X4, Redmi K50 |
| Volume buttons are not working. | The volume control during the call does not affect the sound. | All models with hardware buttons |
Some of the other products (for example, Redmi) A1 s MIUI Android Go mode TTY It can be activated without any visible signs, the sound just disappears. In this case, check the settings manually (instruction below) TTY It can be included separately for each card.
How to turn on or off the teletype mode on Xiaomi Redmi
The path to settings TTY It may vary depending on the version MIUI The following are the current instructions for firmware 2023-2026.
Method 1: Through setting up special features
This is the most reliable method that works on most devices:
- Open the Settings. → Special facilities.
- Scroll down and select Hearing (or Hearing Disorders on older versions).
- Tap on the item Teletype mode (TTY).
- Select Off or the desired mode (Full, VCO, HCO).
- Confirm the changes and restart the phone (recommended).
Method 2: Through call settings (for MIUI 14+)
On new firmware, the path may be different:
- Go to Settings. → Annexes → Calls (or Telephone).
- Select Call Settings → Additionally.
- Find the TTY Mode and turn it off.
Method 3: Using code USSD (power-user)
If the settings menu is not available, try turning off TTY through the engineering menu:
##4636##In the menu that opens, select Phone Information → Shut down. TTY. Beware: Do not change other options in the engineering menu!
Make sure there is no icon in the status bar TTY
Make a test call (the sound should work)
Reboot your phone to apply changes
Check the settings of special features-->
⚠️ Note: On Redmi with custom firmware (e.g. Pixel Experience or LineageOS) the path to settings TTY If the standard methods don't work, try to find the Call settings item. → TTY mode in the English version of the menu.
Why the regime TTY It is on its own and how to prevent it.
Many Xiaomi Redmi users complain that the teletype mode is activated without their participation.
- 🔌 Connecting a headset or hearing aid: Some Bluetooth headsets (especially medical ones) automatically switch the phone to mode TTY. Solution: Turn off the headset, turn off TTY Add it to the blacklist in Bluetooth settings.
- 📲 Failure after update MIUI: Firmware updates can reset special features settings. Solution: Reset network settings (Settings) → SIM-maps and mobile networks → Resetting network settings).
- 🤖 Conflict with hearing-impaired apps: Programs like Live Transcribe or Sound Amplifier can activate TTY. Solution: Remove or disable such applications.
- 🔄 Hardware failure: Damage to the audio connector (3.5 mm) or contacts SIM-The card may falsely trigger as a signal to turn on TTY. Solution: Check the phone at the service center.
If TTY It is activated regularly, try the following algorithm:
- Turn off the teletype mode (see instructions above).
- Remove all spared Bluetooth devices (Settings) → Bluetooth → Delete all devices).
- Reset network settings (Settings) → SIM-map → Resetting network settings).
- Update your firmware to the latest version (Settings → About Phone → System Update).
💡
If after the shutdown TTY There is no sound in the calls anyway, check whether the mode is not activated Do not disturb for calls or whether the redirection of calls to another number is installed.
What to do if after disconnection TTY No sound in the bells.
Sometimes, turning off the teletype doesn't solve the sound problem, and then the reasons may go deeper than that.
| Problem. | Reason. | Decision |
|---|---|---|
| The sound is lost only in the dynamics. | Conflict with speakerphone settings | Turn off speaker in call settings and reset audio settings |
| The microphone is not working. | TTY Could have turned off the main microphone | Call another number and check the microphone in the voice assistant's recordings |
| It's sounding, but it's very quiet. | Resetting equalizer settings | Open the Settings. → Sound. → Equalizer and select Prestos by default |
| The sound is distorted (wheezing, noise) | Damage to the audio codec | Test your phone with headphones – if the sound is clean, the problem is the dynamics |
If none of the methods worked, reset to factory settings (don’t forget to back up!).
- Go to Settings → About the phone → Reset settings.
- Select Reset all settings (does not delete files).
- After the reboot, check the sound in the calls.
An Emergency Method of Recovering Sound
Features of the regime TTY on popular models of Xiaomi Redmi
Despite the general logic of the work, the teletype mode can behave differently on different Xiaomi devices.
Redmi Note 12 Pro / Pro+ / 12T Pro
In these models, MIUI 14 mode mode TTY can conflict with the Dual-Channel Network Acceleration function if activated TTY Not only the sound in the calls, but also the mobile Internet is lost:
- Turn it off. TTY.
- Go to Settings. → SIM-maps and mobile networks → Dual-Channel Network Acceleration.
- Turn off the function and restart the phone.
Redmi 10 / 10A / 10C
On budget models Redmi 10 mode TTY It's often turned on when wired headphones are connected with a faulty headphone socket:
- Use only original or certified headphones.
- Clean the 3.5 mm connector from dust (you can use a toothpick soaked in alcohol).
- Turn off the function Automatic switch to headphones in the sound settings.
POCO X5 Pro / F5 Pro
On series devices POCO s MIUI for POCO path TTY may be hiding deeper:
- Open Settings → System → Advanced settings.
- Choose Special Opportunities → Hearing impairment.
- Turn off Teletype Mode and Audio Monopolization (if any).
💡
On Redmi with Dimensity processor (e.g. Redmi Note 12 Pro)+) regime TTY may affect the work 5G. If after activation the fifth generation network disappears, reset the mobile network settings.
Alternatives to the regime TTY hearing-impaired
If you really need a textual way to communicate on the phone, but built-in TTY It is not stable, consider modern alternatives:
- 📱 Call transcription apps: Live Transcribe (from Google) -- recognizes speech and displays text in real time. Otter.ai records and transcribes searchable conversations. RogerVoice is a dedicated sign language app for the deaf.
- 💬 Voice messaging: WhatsApp and Telegram allow text and voice messages. Viber has a built-in voice-in-text translator.
- 🎧 Special devices: Bluetooth headsets with support ASHA (Audio Streaming for Hearing Aids: Smartphones with preset features for the hearing-impaired (e.g. Huawei Mate 60 Pro with Hearing Aid Mode).
The advantage of modern solutions over TTY:
- 🌍 Works over the Internet (does not depend on the operator).
- 🔄 Supports two-way transcription (you see the text of the interlocutor and your response).
- 📱 Integrate with other smartphone functions (calendar, notes).
⚠️ Note: If you use Xiaomi Redmi with alternative transcription apps, disable the built-in TTY Simultaneous operation of two systems can cause echoes or interruption of communication.