Bootloop Xiaomi: how to charge and revive the smartphone

A situation where the Xiaomi phone endlessly reboots, showing the Mi or Redmi logo, and then goes out again, is known as a bootloop. At this point, the device consumes energy in a jump, which often leads to a full battery discharge before the system has time to start. Users are faced with the dilemma: the phone does not turn on for charging in normal mode, but even when the indicator is turned off, the indicator may not light up.

The main problem is that cyclical reboots create peak loads on the power controller. If you just plug in the cable, the smartphone may start warming, but the charge level will remain zero or grow extremely slowly. It is critical to interrupt the software reboot cycle to put the device into deep charging or engineering menu. Without this step, standard methods may prove useless.

In this guide, we will look at proven ways to bring your gadget out of an infinite loop, and we will look at the methods of hardware reset, forced entry into Recovery mode, and the nuances of working with the battery, which will help you bring the device back to life without immediately going to the service center.

Diagnostics of the state: why Xiaomi is going into a cycle

Before you start taking action, you need to understand the nature of the error. Most often, the bootloop on Xiaomi smartphones is triggered by a software failure after a failed update or the installation of an incompatible module. However, in 30% of cases, the problem lies in the physical wear of the battery or oxidation of contacts.

When the system tries to start, it goes to the kernel files, and if the files are damaged, the initialization process is interrupted, and the device goes to restart. This process requires energy, so the battery runs out faster than it can recharge from the network, and as a result, we see a flashing screen or vibration without an image.

The temperature factor is also important, because at low temperatures, lithium polymer batteries lose their ability to give current, which causes a false discharge signal and triggers a cyclical start, and if the phone is cold, it must be warmed to room temperature before trying to charge.

πŸ“Š How does your Xiaomi behave when switched on?
Vibration and black screen
Mi's logo flashes
Heating in the cell area
Shows the logo and goes out.

Method of forced cycle stop for charging

The most effective way to stop an endless reboot is to interrupt the boot process at the hardware level, using a combination of buttons that blocks the Android operating system from starting and puts the controller in standby mode, which allows all current from the charger to be sent directly to the battery.

You'll need an original cable or a high-quality analogue that supports at least 2 Amps. Connect your phone to the network, then immediately press the volume button. Hold it until the Android robot or the Fastboot logo appears on the screen.

⚠️ Note: While in Fastboot mode, the phone will not fully boot the system, which will eliminate power surges. However, the screen may remain black and the indicator may burn in orange.

If the volume combination doesn't work, try the "deep discharge" method. Leave the phone connected to the charger for 6-12 hours, even if it continues to vibrate or blink. Sometimes the power controller itself blocks the cycles after reaching the minimum voltage threshold. After that, try to press the power button for 20-30 seconds.

β˜‘οΈ Checking before deep charging

Done: 0 / 4

Using Recovery Mode for Resetting

If a simple stop cycle does not help, you need to log into the Recovery Recovery menu, which works independently of the main operating system and allows you to clean the cache or reset data, and this menu is logged in when the phone is turned off (or when you try to turn on) by pressing the power button and the volume button.

Once you're on the menu, you'll see a list of options in English, with volume buttons and power buttons, and the first thing you should do is try Wipe Cache, which cleans temporary files that often cause errors, and it's safe and doesn't delete your personal data.

If the cache cleanup didn’t work, drastic measures would have to be taken: Wipe Data or Factory Reset will completely delete all user data, returning the phone to factory status, often the only way to programmatically fix a damaged file system.

Action in RecoveryData retentionImplementation timeEfficiency
RebootYes.1 minuteLow.
Wipe CacheYes.2-3 minutesMedium
Wipe DataNo.5-10 minutesTall.
Connect with MIAssistantDepends.Depends.For PCs.
What happens if Recovery does not open?
If the recovery menu does not appear, the bootloader may be damaged, in which case only flashing through Fastboot on the computer using the Mi Flash Tool utility will help.

Problems with battery and power controller

When software is exhausted, you have to think about the battery's technical condition. Lithium batteries degrade over time, losing capacity and the ability to keep the voltage under load. When you try to start the processor, the voltage drops below the critical level, and the phone turns off, starting the cycle anew.

You can check the battery indirectly by connecting the phone to a powerful power source, for example, to a USB 3.0 port on a computer or a charger with a current of 3A. If the phone starts charging and after 15-20 minutes independently leaves the reboot cycle, then the problem was in the deep discharge of the cell.

However, if the device warms up in the lower part of the body (where the battery is located) even when it is turned off, this is a sign of an internal short circuit.

πŸ’‘

Try to apply a slight pressure on the back cover in the battery area (if it is removable or plastic), sometimes this helps to restore contact of the plume if the problem is detachment.

The impact of peripherals and accessories on loading

Often, external factors that users forget about are the cause of bootloop: an OTG-connected flash drive, faulty headphones in a 3.5 mm connector, or even contamination of the charging port can short-circuit signal lines, and the smartphone's protection system responds by emergency reboot.

Carefully inspect the USB Type-C or Micro-USB connector. Pocket villi, dust and oxidation can interfere with normal contact. Carefully, using a wooden toothpick or plastic spatula, clean the port. Metal objects are not recommended to use so as not to close contacts.

Also check if any button is clamped in the case.Mechanical pressure on the volume or power key can simulate constant commands, knocking down the boot process. Remove the protective case and try to turn the device on again.

πŸ’‘

Removing all external accessories and cleaning the charging port solves the cyclic reboot problem in 15% of cases without the need to reset settings.

When a service center is needed

There are situations where self-repair is impossible or dangerous: If a phone falls into a bootloop after being hit or moisture is most likely to damage the components of the motherboard, moisture causes corrosion that over time corrodes the tracks, leading to unstable operation.

Another worrying symptom is the lack of button response and charging when connecting to your computer. USB-devices when connecting the cable, this indicates the death of the power controller or a deep failure of the processor.

⚠️ Warning: Attempting to disassemble the phone and replace the battery yourself if there is bloating can damage the display plumes. If you don't have repair skills, you'd better trust the professionals to do it.

In the service center, specialists will diagnose current consumption, if the current consumption in standby mode is significantly higher than normal (for example, 0.5A instead of 0.05A), this indicates a short circuit on the board, repair in this case requires soldering and replacement of components.

Can I recover data with bootloop?
If the phone doesn't boot into the system but it's in Recovery or Fastboot mode, chances are, in Recovery mode you can try backing up if you have that option, or plug in ADB. However, Factory Reset will delete the data irrevocably.
How long can I keep my phone charging in a cycle?
It is not recommended to leave the phone in a state of endless reboot on charging for more than 12 hours. Prolonged heating and power surges can finally finish the power controller or cause the battery to bloat.
Will freezing your phone in the refrigerator help?
This method (the β€œfreezer method”) sometimes temporarily helps with problems with the dumping of the memory chip or processor, but it is extremely risky. Condensation inside the case is guaranteed to lead to corrosion, and this method can only be used as a last resort before discarding the device, pre-tightly packing it.
Why do Xiaomi Mi A1 and A2 often get into bootloop?
The Android One series (A1, A2, A2 Lite) is notorious for its eMMC memory problem. Over time, the memory cells run out of power, and the phone goes into a perpetual reboot. In this case, a software reset won’t help β€” it requires a replacement of the memory chip in the service.