If you are involved in activities like flashing custom ROM or changing firmware of a Xiaomi device and you face the No OS Installed problem, it is definitely something that can cause you a lot of distress. Although there are few users not getting No OS Installed Issue. but lot of users stuck in between. For so this detailed guide is a very reliable and efficient way to solve the problem and also it helps you to recover your device from the partial and full dead state.

⚠️ Warning Before You Proceed to Fix No OS Installed

• During this process all the data on your device will be deleted.
• Make sure that you have understood the possible consequences before you decide to flash the firmware.
• Any damage, data loss, or bricked devices are not our responsibility.

✅ Causes of No OS Installed on Xiaomi Devices

• Violation or incomplete ROM installation.
• System partitions were inadvertently erased in TWRP.
• The ROM was wrong target for the device and thus was flashed.
• An improper bootloader unlocking procedure.

🔧 Prerequisites Before Fixing No OS Installed Issue

• A computer with Windows operating system.
• A Fastboot ROM from official or unofficial source for your Xiaomi model.
• Mi Flash Tool installed on your PC.
• USB cable to connect.
• Drivers for Xiaomi devices installed.
• Battery with at least 50% charged.

🚀 Step-by-Step Guide to Fix No OS Installed on Xiaomi Devices

Step 1: Boot Your Device into Fastboot Mode

• If you are in TWRP Recovery, follow the way:
• Reboot → Bootloader.
• If the device is turned off:
• Hold Volume Down + Power buttons together till you get Fastboot mode.

Step 2: Download the Correct Fastboot ROM

• Go to a reliable third-party Xiaomi ROM website or the official Xiaomi firmware repository.
• Get the Fastboot ROM for your exact device model and region.

Notice: The ROM file must be in .tgz or .tar format (not in Recovery .zip).

Step 3: Install Mi Flash Tool

• Go to the official Xiaomi site or to a trustworthy place and get the latest version of Mi Flash Tool. Then install it on your PC.
• Execute Mi Flash Tool after installing it.

Step 4: Connect Your Xiaomi Device

• Connect the phone in Fastboot Mode to your PC with the USB cable.
• Mi Flash Tool should be able to find your device. If it doesn’t, make sure that the necessary ADB & Fastboot drivers are installed.
• Make sure that you have installed the ADB & Fastboot drivers if Mi Flash Tool still doesn’t recognize your device.

Step 5: Load the Fastboot ROM into Mi Flash Tool

• Complete the extraction of the ROM file that you have downloaded.
• In Mi Flash Tool:
  • Click Select and choose the images folder in the extracted ROM.
• Choose the flashing option at the bottom.
  • clean all – Erases data but bootloader stays unlocked.
  • save user data – Keeps the data (if the system is broken, it is not advised).
  • clean all and lock – Deletes everything and locks the bootloader (not recommended for custom ROM users).

Step 6: Flash the ROM

• In order for Mi Flash to recognize the device, press the Refresh button.
• Starting the process will require you to press Flash button.
• If flashing is successful, a message of success will appear after the progress bar reaches 100%.

Step 7: Reboot and Verify

• When the flashing process finishes, the device will go through the reboot process on its own.
• In case it hasn’t done so: Reboot it manually by pressing and holding the Power button.
• Reboot it manually by pressing and holding

Alternative Solution via ADB Sideload (If Fastboot Fails)

Prerequisites:

• A Recovery ROM that is compatible with your device (in the .zip format).
• TWRP Recovery that is already installed.

Steps:

• Enter TWRP Recovery mode.
• Link your device to the PC.
• Run this on PC: adb sideload rom.zip
• Wait for the process to end.
• Clear Dalvik/Cache.
• Restart to the system.

🛑 Common Errors and Fixes

📜 Conclusion

This comprehensive how-to may solve the No OS Installed problem on any Xiaomi device without much trouble. The direct cause might be botched ROM installation or erased partition, however, the most trustworthy method of fixing the issue is still the one that uses Mi Flash Tool to flash Fastboot ROM. For users who prefer advanced recovery options, ADBSideload remains a viable alternative. Always ensure that the firmware matches your device to prevent complications. So this way you guys can fix No OS Installed Issue, still if anyone have uery then ask them below.