Teletype mode (TTY Mode) on Xiaomi: what kind of program is it and how to work with it

Have you accidentally turned on teletype mode on your Xiaomi and don't know what it is? or noticed a strange icon in the status bar and calls stopped working as usual? TTY Mode, what it's for and how to interact with it, and we'll go through all aspects of this feature in detail, from its history to its practical application on modern smartphones.

Note that even though teletype mode seems to be an archaic feature that was accidentally activated for many users, it is still actively used in some countries for special needs. However, for most Xiaomi owners (especially in Russia and the CIS), this option is not just useless - it can create communication problems. Let's figure out how to work with this.

What is a teletype mode (TTY Mode and why you need it

TTY (Teletypewriter or Text Telephone is a technology that allows people with hearing or speech impairments to communicate on the phone using text, first introduced in the 1960s and used with physical teletype machines. Today, this feature is built into most smartphones, including Xiaomi devices, Samsung and Apple.

In teletype mode, the voice signal is converted to text and back, which allows:

• 📞 Conduct text conversations on regular telephone lines
• 🔄 Use specialty TTY-devices for people with disabilities
• 📡 Connect to emergency services that support TTY
• 🌍 Comply with the legal requirements of certain countries (for example, the United States under the Americans with Disabilities Act)

However, for most Xiaomi users in Russia and CIS, this mode has no practical application, as:

• 🚫 Modern messengers (WhatsApp, Telegram) are completely replaced TTY
• 🚫 Communications providers in our countries do not support TTY-linkage
• 🚫 The function can accidentally activate and interfere with normal calls

How does the mode of teletype on Xiaomi: signs of activation

If you are using Xiaomi (be it Redmi Note 12, POCO X5 Mi 11) suddenly appear strange connection, check for these signs of activation TTY:

The most obvious sign is the icon. TTY It's in the top notification bar, and it can look different depending on the version. MIUI:

• 📱 Nana MIUI 12/13: letter-letter "TTY" grey-background
• 📱 Nana MIUI 14: Teletype icon in the form of an old printing device
• 📱 Nana POCO Launcher: can be displayed as "Text Mode"

If you see a badge like this, don't panic -- it's not a virus, it's not a system failure, it's just that your phone has gone into a special mode of communication that you need to turn off.

Step-by-step instructions: how to disable TTY Mode on Xiaomi

Turning off the teletype mode on Xiaomi smartphones takes less than a minute, if you know the right way in the settings.

Detailed instructions for different versions MIUI:

For MIUI 12/13/14 (Redmi, POCO, Xiaomi):

1. Open the standard phone application
2. Slap three points (⋮) top-right
3. Select Settings → Call settings
4. Find the Teletype Mode or TTY Mode
5. Set the switch to the off position.
6. Restart your phone to apply changes

For older versions. MIUI (11):

1. Go to System Settings
2. Select Additional → Special facilities
3. Find the section "Hearing or Speech"
4. Turn off the teletype mode.

💡

If you don’t have “Teletype Mode” in your settings, try entering the code ##4636## in the phone app and find the option in the test menu.

After the mode is off,

• 🔄 Reboot the phone.
• 📞 Check out a regular voice call
• 📶 Make sure the icon is TTY gone

Why? TTY Mode can turn on on its own

Many Xiaomi users are faced with a situation where the teletype mode is activated without their participation.

1. Accidental pressing of the key combination

On some Xiaomi models (especially those with physical buttons), you can turn on the teletype mode by holding a certain combination.

• 📱 Redmi 9A: volume-retaining + power-up
• 📱 POCO M3: triple-pressing of the volume-down button
• 📱 Mi A3: long-pressing

2. Firmware update

After major updates MIUI (Especially when you upgrade to a new version of Android, some settings can be reset or activated automatically:

• 🔄 Migration of special features settings
• 🔄 Conflicts between old and new configurations
• 🔄 Firmware errors (especially in beta versions)

3. Accessories connection

Some Bluetooth headsets or car hands-free systems can automatically activate the hands-free TTY Mode if:

• 🎧 The device is designed for people with hearing impairments
• 🚗 The car has a system with support for text calls
• 🔌 An adapter is used to connect old teletype equipment

4. Failures in operation SIM-map

In rare cases, problems with SIM-card (especially when roaming) can lead to automatic activation of special communication modes, including TTY.

What to do if TTY Mode does not shut down in the usual way

If standard shutdown through settings didn’t help, try these alternative methods:

Method 1: Resetting network settings

1. Go to Settings. → SIM-maps and mobile networks
2. Select Network Settings Reset (or Wi-Fi, Mobile Network, and Bluetooth Reset)
3. Confirm the action and restart the phone

Method 2: Use of the Engineering Menu

For experienced users:

1. Enter the code in the phone app: ##4636##
2. Go to the section Information about the phone
3. Scroll down to Disable. TTY Mode or similar clause
4. Press and confirm the shutdown.

Method 3: Update firmware

If the problem occurs after the update, try:

• 🔄 Return to the previous version MIUI via Fastboot
• 🔄 Install the last stable firmware through Recovery
• 🔄 Clear the cache through Settings → The phone. → Updating the system → three-point → Clear the cache

Method 4: Complete resetting of settings

If nothing helps, you will have to make a hard reset:

1. Create a backup copy of important data
2. Go to Settings → About the phone → Reset settings
3. Select Reset all settings or Delete all data
4. Confirm the action and wait for the reboot

💡

Before a full reset, try backing up your Mi Cloud or locally to your computer – this will save your contacts, photos, and app settings.

Impact TTY Mode to work on the smartphone Xiaomi

Many users don't understand why you have to turn off the teletype mode if it doesn't interfere. TTY Mode can cause a number of problems:

1.Sound problems during calls

• 🔇 You can’t hear or you can’t hear the conversation.
• 🔊 Distorted noise with interference
• 📞 Automatically shutting down calls through 10-15 seconds

2. Unstable operation of the mobile network

• 📡 Frequent connection breaks 4G/5G
• 📶 Problems with registration in the operator's network
• 🔄 Slowdown of mobile internet

3. Conflicts with other functions

• 🎧 Bluetooth headset is not working
• 🚗 Hands-free problems in the car
• 📱 Incorrect work of voice assistants (Google Assistant, Xiao) AI)

4. Increased battery consumption

Teletype mode causes the communication module to work in a non-standard mode, which can lead to:

• 🔋 Accelerated battery discharge (up to) 15-20% one hour in standby)
• 🔥 Overheating of the processor during long conversations
• ⚡ Unstable operation of the fast charging function

💡

If after the shutdown TTY Mode communication problems remain, check the settings APN Your operator, they could have gone astray.

TTY Mode on different models Xiaomi: features and nuances

Although the principle of operation of the teletype mode is the same on all Xiaomi smartphones, there are some differences depending on the model and firmware version:

On some models (especially budget Redmi) the teletype mode can run unstable due to limited hardware resources. TTY Mode phone started to brake or overheat, try:

• 🔄 Reset the device
• 🧹 Clear the cache through Settings → Warehouse
• 🔧 Remove the firmware to the previous version

For flagship models (Xiaomi 13 Ultra, Mi Mix Fold), the teletype mode usually works correctly, but can conflict with advanced features such as:

• 🎤 Noise suppression during calls
• 🔊 3D-headset
• 📡 Dual SIM + VoLTE

FAQ: Frequent questions about Xiaomi's teletype mode