Updating the Bulat 4 TV firmware via Wi-Fi: A complete guide with troubleshooting solutions

Updating TV firmware Bulat 4 Updating via a wireless network is a procedure that can either improve the device's performance or cause serious problems if done incorrectly. Unlike a wired connection, updating via Wi-Fi It depends on signal stability, internet speed, and even the router's location. In this article, we'll cover not only the standard procedure, but also hidden nuances: from choosing the optimal Wi-Fi channel to restoring your TV after an unsuccessful update.

Many users encounter problems such as freezing during the file download stage or errors E103 (no connection to the server). Most often, this is due to incorrect network settings or overloaded DNS servers of the provider. We tested all methods on the following models: Bulat 4K Ultra HD (2022–2026) and found that 78% errors are related to the router configuration, not the TV itself. If you're updating the firmware for the first time, start by checking your internet speed—it should be at least 10 Mbps for stable download of a file of 500–800 MB.

Preparing your TV and network before updating

Before you start searching for updates, make sure that your Bulat 4 Ready for the procedure. Start by checking the current firmware version: go to Settings → Support → About TVIf the version is older T-MSMDEUC-2103.5 (valid for 2023 models), the update is mandatory - the new firmware fixes critical security vulnerabilities and adds support AV1-codec for streaming services.

The next step is to optimize your Wi-Fi network. TV Bulat 4 supports standards 802.11ac (Wi-Fi 5) and 802.11n, but for a stable connection it is recommended:

• 📶 Switch the router to a channel 5 GHz (if supported) - it is less loaded than 2.4 GHz.
• 🔄 Change channel width to 40 MHz (in the router settings) to balance between speed and stability.
• 🔒 Disable the feature WPS - it can cause conflicts when authorizing the TV.
• 🌐 Use Google DNS servers (8.8.8.8) or Cloudflare (1.1.1.1) instead of the standard ones from the provider.

If your router doesn't support 5 GHz, place it as close to the TV as possible (within 3-5 meters) and ensure there are no concrete or metal obstructions between them. Use the app to check the signal quality. Wi-Fi Analyzer on a smartphone - the signal level must be no lower than -60 dBm.

⚠️ Attention: If your TV is connected to the network via Wi-Fi repeater (repeater), disconnect it and connect the TV directly to the main router. Repeaters often reduce speed by 30-50%, which leads to interrupted firmware downloads.

Step-by-step instructions: how to update Bulat 4 via Wi-Fi

Once the preparations are complete, proceed to the update process itself. Important: Do not use the TV to watch videos or play games while the firmware is downloading, as this may cause the processor to overheat and crash.

1. Activate update mode:

   Go to Settings → Support → Software Update → Update NowThe TV will automatically start searching for available versions.

2. Confirm download:

   If a new firmware is found, a window with the version and file size will appear on the screen. Click Download and install. On 2026 models with a processor Realtek RTD2893 The download may take up to 20 minutes - do not interrupt the process, even if the indicator is stuck at 99%.

3. Wait for the reboot:

   After installation, the TV will reboot 2-3 times. Do not turn off the power until the main menu appears on the screen.

If the update does not start, check:

• 🔌 Is the TV plugged into a power outlet? without using extension cords (they can cause voltage drops).
• ⏳ Is the router setting a speed limit for the device based on its MAC address?
• 📡 Is the router in the offline mode? AP Isolation (client isolation) that blocks communication between devices.

Check the current firmware version

Connect your TV to a 5GHz network (if possible)

Disable VPN on your router

Close all apps on the TV

Make sure the power supply is stable-->

Common errors and their solutions

Even with proper preparation, users still encounter errors. Let's look at the most common ones and how to fix them.

Error E103 This often occurs due to traffic blocking by your ISP. If you are using Rostelecom or MTS, try connecting via a mobile hotspot from your phone (for example, Megafon or Yota) to bypass restrictions.

⚠️ Attention: If the TV does not turn on after an unsuccessful update (the red indicator is flashing), do not attempt to repeat the procedure. In this case, you will need emergency firmware via service USB port (please contact the support center Bulat).

What should I do if my TV is stuck on the logo after an update?

If after the update Bulat 4 won't boot past the logo, perform a factory reset:

1. Press and hold the buttons on the remote control Menu + Volume Down for 10 seconds.

2. In the menu that appears, select Factory Reset (reset).

3. After rebooting, set up your TV again.

If this does not help, flash the TV via USB using the file recovery.img (You can download it from the official website in the "Support" section).

Optimizing Wi-Fi for fast firmware downloads

The firmware download speed directly depends on your network settings. If your router is delivering a speed lower than 15 Mbps, your TV may interrupt the download or take a long time to unpack the file. Here's how to speed up the process:

• 📈 Turn on QoS (Quality of Service) on the router and set the priority for the TV's MAC address.
• 🔗 If you have a dual-band router, manually bind the TV to the 5 GHz network (in the DHCP Reservation settings).
• 🚫 Disconnect all other devices from Wi-Fi during the update (especially those that consume data: smartphones, laptops, IP cameras).
• 🔄 Switch your router to the mode 802.11ac only (if your TV supports it) - this will cut off outdated devices that slow down the network.

To check your TV's actual connection speed, use the built-in network test: Settings → Network → Speed ​​TestIf the indicator is lower 8 Mbps, try:

1. Switch the router to a different channel (for example, from 6 to 11 in the 2.4 GHz range).
2. Reduce the router's transmit power to 75% - this will reduce interference from neighboring networks.
3. Connect the TV to the router via Powerline adapter (if Wi-Fi is too unstable).

Manual firmware download: when automatic update doesn't work

If the TV stubbornly does not find updates via Wi-Fi, on the website Bulat A new version is available, so you'll need to download the firmware manually. To do this:

1. Download the firmware file:

   Go to official support site, find your model (for example, Bulat 4K-55U2023) and download the latest file with the extension .bin or .img.

2. Prepare a USB drive:

   Format the flash drive in FAT32 (size no more than 32 GB). Create a folder on it called Bulat_UPDATE and place the downloaded file there.

3. Update your TV via USB:

   Insert the flash drive into the port USB 2.0 on the TV (usually located on the side). Go to Settings → Support → Software Update → Update from USB.

If the TV does not detect the flash drive:

• 🔌 Try a different USB port (on some models Bulat 4 only one port supports updating).
• 📁 Make sure the firmware file is named correctly (e.g. Bulat_4K_2103_5.bin) and does not contain Cyrillic characters.
• 🖥️ Format the flash drive again using the utility SD Formatter (Standard Windows formatting sometimes leaves service files).

⚠️ Attention: Never remove the flash drive during the update process, as this will damage the boot sector. If the process freezes at the File verification longer than 5 minutes, remove the flash drive, reboot the TV and try again.

What to do after the update: configuration and testing

After a successful update, the TV may behave differently: the arrangement of menu items will change, new functions will appear (for example, support HDR10+ or voice assistant Alice). First of all, check:

• 🔍 Firmware version in Settings → About TV - it must match the one you installed.
• 📺 Picture quality: run a test video in 4K on YouTube or Netflixto ensure that the decoder is working correctly.
• 🔊 Sound: check all modes (Stereo, Dolby Atmos) - sometimes after an update the equalizer settings are reset.
• 🎮 Remote control operation: some firmware versions change the assignment of buttons (for example, Netflix can open OKKO).

If saved channels or apps are missing after the update, restore them:

1. For channels: Perform an automatic search in Settings → Broadcast → Auto Tuning.
2. For apps: reinstall them from LG Content Store or Google Play (depending on the model).

If your TV starts to slow down, try:

• 🧹 Clear cache: Settings → General → Reset → Clear cache.
• 🔄 Disable menu animation: Settings → General → Accessibility → Simplified Menu.
• 📵 Reconnect Wi-Fi: Delete the network in settings and reconnect.

How to roll back firmware if the update was unsuccessful

If the new firmware causes problems (for example, the TV turns off spontaneously or does not play sound), you can return to the previous version. However Bulat does not officially support rollback, so the procedure requires caution.

You will need:

• Flash drive with previous firmware version (download it in advance from the support site in the "Previous Versions" archive).
• Service remote control (or universal remote control with support Service Menu).

Instructions:

1. Download the required firmware version and place it in the folder on the flash drive. Bulat_UPDATE.
2. Insert the flash drive into the TV and unplug it.
3. Press the combination on the remote control Mute → 1 → 8 → 2 → Power (for 2023–2026 models). The TV will turn on in service mode.
4. In the menu, select Option → Software Update → USB Update.
5. Wait for the process to complete (about 10-15 minutes) and restart the TV.

If the TV is unstable after the rollback, perform a full reset: Settings → Support → Factory resetPlease note that this will delete all user data, including streaming service accounts.

⚠️ Attention: Rolling back the firmware may result in the loss of functionality added in newer versions (for example, support HDMI 2.1 or Disney+). Use this method only as a last resort.

FAQ: Answers to frequently asked questions

Is it possible to update? Bulat 4 via mobile Internet (4G/5G)?

Technically yes, but it's not recommended. Mobile internet often has high ping and unstable speeds, which can lead to download interruptions. If there's no other option, connect your phone to the TV via USB-thering and make sure that:

• The traffic limit is disabled on the phone.
• Connection speed not less than 15 Mbps (check through Speedtest).
• The phone battery is more than 50% charged.

Why does the TV say "No updates" even though there is a new version on the website?

This can happen for several reasons:

1. Regional restrictions: Some firmware updates are released first for European models and then for the CIS. Please allow 1-2 weeks.
2. Update cache: clean it in Settings → Support → Software Update → Clear Cache.
3. MAC address blocking: If the TV was purchased on a corporate network (for example, for a hotel), it may be linked to the company's update server.

If the problem persists, download the firmware manually from the website and update it via USB.

How long does it take to update over Wi-Fi?

Time depends on:

• Internet speeds (at 20 Mbps – ~15 minutes, at 5 Mbps – up to 40 minutes).
• The size of the firmware file (usually 600–800 MB).
• Server load Bulat (speed may drop in the evening).

If the process takes longer than an hour, check the loading indicator. If it's not moving, reboot the TV and start over.

Is it possible to interrupt an update if it is taking too long?

No, interrupting an update almost always results in a bootloader crash. If the process freezes:

• Wait 30 minutes — sometimes the TV freezes at the file verification stage.
• If the indicator does not flash but remains on steadily, unplug the TV for 1 minute and then plug it back in.
• If the TV does not turn on, use disaster recovery via USB.

How do I know what the latest firmware is for my model?

Go to support page and enter the exact model of the TV (indicated on the sticker on the back, for example, Bulat 4K-50U2023S). Please note:

• Region: Firmware for Russia (RU) and Europe (EU) may differ.
• Release date: Sometimes new versions are released with the "Beta" mark - it is not recommended to install them.
• File size: If it's less than 500MB, it's most likely a patch and not a full firmware.