Your Xiaomi Redmi Note 4 suddenly stopped booting, constantly rebooting on the Mi logo, or flashing a recovery screen? This is a classic bootloop - a cyclical reboot that blocks access to the system. The problem is familiar to many owners of this smartphone, especially after unsuccessful updates, experiments with root rights or physical damage.
Unlike bricks, when a device doesn't respond fully, bootloops are often repairable without a service center, and 80 percent of the time, it's a software failure, not a hardware failure, but it's important to act quickly: constant reboots drain the battery, and without power, the chances of recovery drop dramatically.
In this article, 7 proven ways to exit the bootloop for Redmi Note 4 (including Note 4X and Note 4 Pro modifications), from simple (reset via Recovery) to complex (flashing through EDL), also let us analyze how to avoid re-occurring and when it is still worth carrying the phone into service.
What is bootloop and why does it appear on the Redmi Note 4?
Bootloop (from English boot - boot and loop - loop) is a state when the smartphone can not complete the process of booting Android and constantly restarts. On the Xiaomi Redmi Note 4, the problem manifests itself as follows:
- 🔄 The screen flashes the Mi logo or download animation, then goes out and repeats the cycle.
- 📱 The phone vibrates when turned on, but it does not go beyond the logo.
- ⚡ The device discharges in a few hours due to constant reboots.
- 🔌 PC Connection Defines Phone as an "Unidentified Device" or Qualcomm HS-USB QDLoader 9008.
The main reasons for bootloop on Redmi Note 4:
- 📲 Failed update MIUI (particularly OTA bug-box).
- 🔧 Incorrect obtaining root rights or installing custom recavery (TWRP).
- 🗑️ Damage to system files (e.g., after cleaning the cache through Clean Master).
- 🔋 Hardware problems: a faulty battery, oxidized contacts or damaged memory (eMMC).
- 💥 Failures after a “hard” reset (for example, via fastboot erase userdata without further flashing).
Fun fact: Redmi Note 4 on the Snapdragon 625 processor is less prone to bootloop than the Helio X20 version (due to the peculiarities of working with memory), but both models suffer from a problem after installing unofficial firmware with XDA Developers.
⚠️ Note: If the bootloop appeared after a phone drop or moisture hit, do not try to sew the device - this can aggravate the damage to the board. First check the hardware (see the section "Diagnostics before repairs").
Diagnostics before repair: hardware or software problem?
Before you start recovery, you need to rule out physical malfunctions.
- Check the battery: 🔋 Connect your phone to charge at 30+ If the charging indicator does not light or flashes, the problem is in the battery or power controller. 🔌 Try another cable and power supply (preferably the original Xiaomi on 2A).
- Check the connectors: 🔍 Remove the back cover (if possible) and check if the battery or display plumes have moved away. 💧 Look for traces of oxidation on contacts (green plaque) - this is a sign of moisture ingestion.
Button test:
- 🔘 Hold the volume.+ + Power for 10 to 15 seconds. If the phone vibrates or tries to boot, the buttons work.
- 🔇 If there is no reaction, the problem may be in the power button or motherboard.
If the phone still loads into the bootloop after reset, move to the next method. If recovery doesn't open or if it gives an error "E:unknown volume for path [/data]", this is a sign of a damaged data partition - you will need to flash it back.
Take time (the process can take up to 10 minutes)
Make sure the battery is at least 30% charged
Prepare the original USB cable (in case of connection to a PC)
Take a picture IMEI phone (on a box or under a battery)-->
Method 2: Fastboot Firmware (for power users)
If the reset didn't work, the next step is to flash the phone over Fastboot mode, which is appropriate if:
- 📱 The phone is defined as an Android Bootloader Interface.
- 🔧 You have the original cable. USB Type-C (non-Chinese cheap cables often don't transmit data to Fastboot).
- 💻 Drivers are installed on the PC ADB/Fastboot and Mi Flash Tool.