How to turn on Xiaomi Redmi 12: 5 ways to launch a smartphone in any state

Xiaomi Redmi 12 is a popular budget smartphone with a powerful Snapdragon 4 Gen 2 processor and a capacious 5000 mAh battery. But even such reliable devices sometimes refuse to turn on after a deep discharge, software failure or unsuccessful update. In this article, we will discuss all possible ways to turn on the Redmi 12, from basic to emergency, with an explanation of why the phone may not respond to the power button.

If your Redmi 12 doesn't show signs of life -- the lights don't burn, the charging doesn't vibrate, even the MIUI logo doesn't start -- don't rush to bring it to the service. In 80% of cases, the problem is solved on its own in 5-10 minutes, the main thing is to correctly diagnose the cause and choose the appropriate method.

1. Standard Enablement: What to Do If Redmi 12 Doesn't React to a Button

To begin with, how to turn on the Xiaomi Redmi 12 when it is turned off normally (for example, after an update or manually).

1. Connect the smartphone to the charger (preferably the original) for 10-15 minutes.
2. Press the Power button (on the right side edge) for 5-7 seconds until the MIUI logo appears.
3. Wait for the full system load (can take up to 2-3 minutes, if you have not restarted for a long time).

If the screen is black, check:

• 🔌 Charger and cable: try another power supply (better on the phone) 18W+) cable USB-C. Faulty accessories - the cause №1 "Dead" Smartphones.
• 🔋 Charge level: if the battery is discharged to 0%, the first 5-10 minutes after charging the indicator may not burn.
• 📱 Physical damage: inspect the connector USB-C for the presence of dirt, moisture or bent contacts.

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If the indicator flashes red after charging, but the phone doesn't turn on, it's a sign of deep discharge. Leave it on charging for at least 30 minutes before trying again.

What if the Power button doesn't work? Redmi 12 has a backup way of turning on via a keyboard combination:

1. Get the charger on.
2. Press the Power + Volume Up buttons for 10-15 seconds at the same time.
3. Release when the MIUI logo or Fastboot menu appears.

2.Switching on after deep discharge: why the Redmi 12 doesn't charge

If the Redmi 12 battery is discharged to 0% and has been in this state for more than a day, the power controller can block charging to protect the battery, in which case a standard connection to the network will not help - you need to "wake" the smartphone forcibly.

Instructions for "resuscitation" after deep discharge:

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• ⚡ Use the original adapter (or Quick Charge 3.0 certified). Left-handed charging may not give enough current.
• ⏳ Leave your smartphone on charge for at least 30 to 60 minutes before you try to turn on. The first 10 to 15 minutes the indicator may not burn.
• 🔄 If after an hour of charging there is no reaction - try another cable or connect to the computer through the USB.

⚠️ Warning: If the phone turns on after this action, but immediately turns off, this is a sign of a malfunction of the battery. ₽ service-centre).

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3. Forced reboot: how to turn on Redmi 12 if it freezes

If Redmi 12 is stuck on the MIUI logo, black screen, or doesn't respond to touch, hard reset will help, which doesn't delete data, but resets all the time processes.

Methods of forced reboot:

If after a hard reset the phone turns on, but freezes again - this may indicate:

• 🛠️ Damaged firmware (you need to reflash through Fastboot).
• 🧹 Completed memory (less than 1 GB of free space).
• 🦠 Viral Software (check out Google Play Protect).

4. Enable via Fastboot: if Redmi 12 doesn't load beyond the logo

Fastboot mode is an engineering menu that allows you to reflash the phone even if the main system doesn't start.If Redmi 12 is turned on but hangs on the logo or reboots cyclically, Fastboot will help restore the working capacity.

How to log in to Fastboot:

1. Turn off the phone (if it's on, press the Power for 10 seconds).
2. Press the Power + Volume Reduction at the same time.
3. Hold on until the image of Fastboot (a robot labeled FASTBOOT) appears.

In this mode, you can:

• 🔄 Reboot system (fastboot reboot command).
• 📥 Install firmware through Mi Flash Tool.
• 🔧 Reset your settings (if your phone is locked).

⚠️ Warning: Don't exit the Fastboot by simply turning off the cable! this can damage the boot sector.Always use the fastboot reboot command or the Power button for the correct output.

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If your phone is not computer-defined in Fastboot mode, install Qualcomm HS-USB QDLoader 9008 drivers and check the USB 2.0 connection (USB 3.0 may not work).

5.Recovery through Recovery: Reset to factory settings

If Redmi 12 is turned on but does not load beyond the MIUI animation, or you have forgotten the pattern lock, Recovery mode will help. This method deletes all data (photos, contacts, applications), so use it only as a last resort.

How to start Recovery Mode:

1. Turn off the phone.
2. Press the Power + Volume Up.
3. When the MIUI logo appears, release the Power, but keep holding the Volume Up.
4. From the Recovery menu, select Wipe Data → Wipe All Data (manage volume buttons, confirmation – Power).

Once reset, the phone will reboot and prompt you to configure it as new, and it's important that if you've previously turned on Mi Account, you'll need to enter your username and password to unlock it.

⚠️ Note: If the error "Can't mount" appears in Recovery /data" — This is a sign of a corrupted file system, and in this case, only flashing through Fastboot will help.

6. Hardware problems: when to carry in the service

If none of the above methods worked, the problem could be hardware.Here are signs that the Redmi 12 needs repair:

• 🔥 The phone warms up when charging, but does not turn on - a short circuit on the board is possible.
• 💧 There was corrosion on the connector. USB-C or under the battery - the consequences of moisture.
• 🔋 Battery swollen (seen on the raised screen) - requires immediate replacement!
• 📵 No reaction to charging even after cleaning the connector - a malfunction of the power controller is possible.

Average prices for repairs Xiaomi Redmi 12 in service centers (2026):

Before you bring your phone to the service, check:

• 🔍 Warranty: If the Redmi 12 was purchased less than a year ago, the repairs can be free of charge.
• 📦 Check or box: some services require proof of purchase.
• 🔄 Backup: If the phone is sometimes turned on, copy the data to the PC.

FAQ: Frequent questions about incorporating Xiaomi Redmi 12