If you own a Xiaomi device — a smartphone, a TV, or even a smartwatch — you've probably seen a notification that a "full upgrade" is available. But what does that really mean? Why does it suggest not just upgrading, but doing it "fully"? And most importantly, how does it differ from a regular update that comes in a few minutes?
In this article, we will take a closer look at what the term “full OTA” is about in the Xiaomi ecosystem when it’s really needed and when it’s possible to get by with a standard update, how it works across different types of devices (smartphones, TVs, routers), what pitfalls can occur, and how to minimize the risks of “bricking” your gadget, and why your Redmi or Mi TV can start working faster after such an upgrade than it’s reset to factory settings.
Full Update vs. Regular: What’s the Difference?
The main difference between a full OTA and an incremental OTA is the amount of change and the installation mechanism. A regular update is a patch that only makes changes to system files that have changed since the previous version, for example, if only the camera module and the security core have been updated in a new firmware, only these components (usually weighing 50-300 MB) are downloaded.
But the full update is actually a new clean version of the firmware that overwrites all system partitions of the device, which can be as large as 2-4 GB (for smartphones) or 1-1.5 GB (for Mi TVs). Why so much? Because the package includes:
- 📁 All system applications (MIUI Launcher, Security, Gallery, etc. in current versions.
- 🔄 Completely reassembled Android kernel (or MIUI for TV) with the latest security patches.
- 🗃️ Recovery files, boot files and modules (vendor).
- 🎨 Default theme and fonts (yes, they are also updated!).
That's why, once fully updated, the device can be more stable: all broken files are replaced with fresh ones, rather than being over-stuffed, but there's a downside to it, which is that it takes longer and requires care.
When should I make a full update?
Despite the obvious benefits, a full upgrade is not always necessary, and here are the cases where it is actually needed:
- Once reset to factory settings.If you have done a hard reset (for example, before selling the device), installing full firmware ensures that the system is “clean” without traces of old data.
- When you upgrade to a new version of MIUI/Android, like MIUI 13 to MIUI 14 or Android 12 to Android 13, incremental updates may not be able to cope with such global changes.
- If the device is “glutting” after regular updates, bugs like spontaneous reboots, brakes or application errors are often solved with complete flashing.
- For custom firmware devices, if you’ve previously put custom ROM (like LineageOS), it’s better to return to stock MIUI through a full upgrade.
Here’s when you shouldn’t waste time on a full update:
- ⚠️ If you just want to get the latest security patches (incremental updates are enough).
- ⚠️ On new devices (bought less than 3 months ago) - their firmware is already relevant.
- ⚠️ With limited traffic (full package weighs 5-10 times more than usual).
💡
Before a full update, check the free space on the device - for smartphones you need at least 5-6 GB, for Xiaomi TV - 2-3 GB. If there is not enough space, transfer files to a memory card or PC.
How the process goes: step-by-step instructions
The procedure for a full upgrade varies depending on the type of device, and let’s consider two of the most common scenarios: for Xiaomi/Redmi/Poco smartphones and Mi TVs.
📱 For smartphones and tablets
☑️ Preparation for a full smartphone update
1. Downloading firmware.
Full service packs (.zip) can be obtained in two ways:
- 🔗 Through the Update menu: Go to Settings → The phone. → Update system, click on three dots in the upper right corner and select Select Service Pack.
- 🌐 Manually from the site: download the firmware for your model on the official resource MIUI Downloads (select the Recovery version) ROM for installation through stock recovery).
2. Installation.
If you downloaded the package manually:
- Put the update.zip file in the root of internal memory (not in folders!).
- Go to Settings → About Phone → System Update → Three Points → Select an Service Pack.
- Select the downloaded file and confirm the installation.
The device will be rebooted to recovery mode, where it will be checked and installed (it will take 5-15 minutes).
📺 For Xiaomi TVs (Mi) TV)
On TVs, the process is simpler, but requires a mandatory connection to the Internet via cable (Wi-Fi can interrupt the download).
1. Open the menu: Settings → About TV → System Update.
2 If a full update is available, you will see the Update button in full (in English firmware - Full Upgrade).
3. Confirm the action and wait for the completion (the TV will restart 2-3 times).
What to do if the update is suspended?
Risks and how to avoid them
Full updates are a robust process, but not without risks.
| Problem. | Reason. | How to avoid |
|---|---|---|
| The device does not turn on after the update ("brick") | Interrupted installation or incompatible firmware | Do not turn off power during the process, download firmware only from the official website |
| Data loss (photos, contacts, messages) | Resetting or installation error | Backup through Settings → Additional → Backup |
| TV or smartphone "lags" after the update | Conflict of old data with new firmware | Reset to factory settings after update |
| Error "Cannot verify update" | A damaged firmware file or an incorrect model | Check the hash amount (MD5) of the downloaded file, download again |
⚠️ On devices with bootloader unlocked, a full update may result in loss of TWRP If you're using custom recovery, back up the recovery section before you upgrade.
Critical: On Xiaomi’s Mi TV 4S/5 series (2018–2020), full Wi-Fi upgrades are often interrupted by unstable connections.
Frequent mistakes and their solutions
Even with proper preparation, users are faced with errors, and here are the most common ways to correct them:
- 🚫 Error 7 (Error 7) when installing: means the firmware is not suitable for your model. → The phone. → Model (for example, Redmi Note 10 Pro and Redmi Note 10 Pro Max – different firmware!).
- 🔄 Cyclical reboot after update: helps reset via fastboot. connect the device to the PC, start the command: fastboot erase userdata fastboot reboot
- ⚠️ TV does not respond to the remote after the update: reset the remote (press Menu) + Home for 5 seconds, then reconnect it in the Settings menu → DU remote.
- 📱 The smartphone can't see. SIM-Map: Update the operator's settings in Settings → SIM-maps and mobile networks → Access Point Settings (Select Your Operator Manually).
💡
If the device is slower after a full upgrade, do a soft reset: turn it off for 10 minutes, then turn it on and wait for full loading (don’t interrupt the background processes), which solves the problem 80% of the time without losing data.
Myths about complete renewal: what is true and what is not
There are many myths surrounding Xiaomi’s full updates, and we’ll look at the most popular ones:
Myth 1: “A complete update erases all data.”
Reality: No, if the process is successful, your files will stay in place. However, there is always a risk of failure, so backup is mandatory. Except for the switch to a new version of Android (for example, 11 to 12), where sometimes you need to reset.
Myth 2: “After a full upgrade, the battery goes down faster.”
Reality: In the first 2-3 days after the update, the system indexes files and optimizes work, so battery consumption can increase. But after a week everything will normalize. If not, check the background processes in Settings → Battery.
Myth 3: “A complete upgrade can be interrupted and continued later.”
Reality: This is the most dangerous myth! interruption of the process (especially during the writing phase of the system partition) is almost guaranteed to lead to the "bricking" of the device. If an update begins, wait for it to be completed (even if it takes an hour).
Myth 4: “Castom firmware can be installed through a full upgrade.”
Reality: No, the full Recovery ROM is only for stock MIUI. Custom firmware (Pixel Experience, HavocOS) requires an unlocked bootloader and installation via TWRP.
Alternatives to a full update
If you need to fix a specific problem (such as fixing bugs or speeding up your device), a full upgrade isn’t always the only option.
- 🔧 Factory reset: helps with software bugs, but doesn't update system files. → Additionally. → Resetting settings.
- 🛠️ Manual Installation of Incremental Update: If the full update is too big, you can download and install the latest incremental packages alternately.
- 📦 Cleaning cache: sometimes brakes are caused by a crowded cache.clean it in Settings → Warehouse → Clear the cache.
- 🔄 Reverse to the old version: if the new firmware works worse, you can return the previous one through the Mi Flash Tool (only for smartphones!).
⚠️ On Xiaomi TVs, rollback to the old firmware version is not officially supported and can lead to loss of functionality (for example, Netflix or YouTube will stop working due to outdated ones). DRM-key).