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Firmware Lenovo P90 Pro

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Before flashing, you need
Create a full backup of the firmware.
The battery must be 100% charged.

1. Flashing your phone using CWM Recovery
2. Flashing the phone using TWRP Recovery
3. Flashing the phone using Fastboot

1. Phone flashing using CWM Recovery
The rich functionality of CWM Recovery www.clockworkmod.com allows you to perform many manipulations with the device, including rolling the firmware. By default, stock Recovery is installed in the devices, which means that first you need to install the ClockWorkMod Recovery utility itself.
The general firmware process described below is for ZIP files. Instructions: - Download the firmware and place it on the phone's memory card.
- Turn off your smartphone with the Power button.
- Press a certain combination of buttons on the phone, the combination may vary depending on the manufacturer of the phone. If you do not know the required combination, try pressing the following keys.
- Press the buttons: Volume up (or Volume Down) (+Home) + Power together for a short time.
- Recovery mode will appear on the screen.
- Use the volume buttons to navigate the menu, and use the Power button to select.
- Next in the menu, select 'Wipe data / factory reset'.
- Select 'Yes - delete all user data' and confirm your choice with the Power button.
- Then select 'Wipe cashe partition' from the menu.
- Select 'Yes - Wipe cache' and confirm with the Power button.
- From the Recovery mode menu select 'advanced' .
- Select 'Wipe Dalvik Cache' and confirm with the Power button.
- Then select 'Yes - Wipe Dalvik Cache' from the menu.
Go back, press 'Go Back'.
- From the menu select 'mounts and storage' .
- Next in the menu, select 'format / system' .
- Then select 'Yes - Format' from the menu.
Go back, press 'Go Back'.
- Select 'install zip from sdcard' .
- Next in the menu, select 'choose zip from sdcard' .
- After that, select the item 'Yes - Install your firmware name' from the menu.
- Then select 'Reboot system now' from the Recovery mode menu.

2. Flashing the phone using TWRP Recovery
For those who prefer working with the utility in the form of TWRP Recovery, the following instructions for the step-by-step installation of the update in the form of a ZIP archive are offered:
- Download the firmware and place it on the phone's memory card.
- Go to TWRP recovery. This is done by analogy with CWM.
- Perform a factory reset. When finished cleaning the phone, return to the original menu by pressing the 'Back' key.
- In the main menu, select 'Install' and select the firmware file. Click on it by dragging the slider to the side.
- The process of flashing the phone will take 2-3 minutes.
- Upon completion, the utility will automatically display a message about successful flashing. Click on the 'Reboot System' item, and reboot the device.

3. Flashing the phone using Fastboot
A universal tool for flashing Android smartphones using a PC is the Fastboot utility. It is part of the SDK Platform Tools, which means it is suitable for a large number of devices.
Before starting the firmware, you need to get access to the system kernel. Very often, many manufacturers block this system parameter, not wanting users to change the system files of their firmware images with their own hands. To do this, you need to unblock Bootloader. To do this, you need to study the detailed instructions for configuring and managing the command line. Before starting the firmware using a computer, do not forget to enable USB debugging of the device in the engineering settings of the device.
- Copy the .zip archive with the firmware image to the folder with 'ADB'
- Next, you need to put your device into fastboot mode and write a request in the command line: fastbooflash zip filename.zip.
- After the end of the installation, reboot your phone.

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