1, download the Chinese recovery card brush module of our Lenovo A820t;
2. The driver for installing the wire brush is not described in detail here. The specific drive installation method is as follows:
Step 1: Download the last A820T line brush driver, unzip it to the back, turn off your Lenovo A820T mobile phone and button the battery. The whole process of installing and driving does not need batteries;
The second step is to open the "Device Manager" of the computer (right-click my computer to open it);
Step 3: Connect the mobile phone and computer with USB data cable instead of battery. Pay attention to the device manager of your computer at this time. When plugged in, an exclamation point driver will pop up (MT 65xx pre-installed). Note that it only appears for a few seconds. When it appears, double-click it immediately.
Step 4: After double-clicking the driver with exclamation mark, a window will pop up and select "Update Driver".
Step 5: As shown above, after selecting update driver, select "Browse Computer to Find Driver". If it is an XP system, the installation of a new driver should automatically pop up when you connect your mobile phone, and then choose to browse the computer to select the driver instead of automatically searching.
After selecting in step 6, the above window will appear. If you are lazy, you can choose the first one, browse to the driver folder, and let the computer automatically search and install the driver in the folder you choose, but sometimes you will be prompted "Unable to install". At this time, you have to manually select the driver, that is, the second "select from the device driver list of the computer" in the above picture, and then in the window that appears, it is ok by default and go directly to the next one.
Step 7 In the next window, select "Have Disk", then go to the driver folder and select driver installation under the corresponding system folder. What needs special explanation here is that if I have win7 system, I will choose your corresponding file. If it is 32-bit, I will choose the middle. If it is 64-bit, I will choose the last one. If it is XP system, I will choose the corresponding driver under XP folder.
Step 8 After selecting the driver, click "OK". Next, win7 will prompt to install the driver and select "Always install …".
Step 9: After the above picture appears, you can turn it off, and then check whether the line brush driver we want is installed correctly. The way to verify whether the driver is installed successfully is to repeat the initial step, that is, directly connect the mobile phone to the computer without battery, and see if the device manager will pop up the driver with exclamation mark. If it keeps popping up, it means that the installation was not successful and needs to be restarted. If plugged in, the pop-up driver has no exclamation point.
Next, we need to brush Chinese to recover.
1. Download the Chinese recovery card brush module of our Lenovo A820t first;
2. Install the driver for the line brush, as described above;
3. After installing the driver, download the MT6589 quad-core Lenovo A820t line brush tool;
4. Turn off our Lenovo A820t mobile phone, then turn on the line brush tool, click "Load Scatter", then select the following MT6589 _ Android _ scatter _ emmc.txt document under the downloaded Chinese recovery card brush module file, and then check "DA DL All With Check Sum". Then click Recover in the box below, select recovery.img under the folder of Chinese Recovery Card Brush Module, and make sure that the check of recovery signature is checked!
5. Note: Be sure to check the "DA DL ALL" box to confirm the above settings are correct, click "Download" to open a dialog box, select "Yes", and then plug your Lenovo A820T into the computer with the data cable. At this point, the progress bar under the brush tool will disappear. After a few seconds, a small window will pop up with a green circle inside, indicating that you have successfully brushed in Chinese to restore.
Two ways for Lenovo A820T to enter Chinese recovery mode;
1. Automatically restart (enter) the recovery mode by using Tredas or the brush wizard;
2. Manual entry: When the mobile phone is turned off, press and hold the power button of the mobile phone for 2 seconds, and then press and hold the volume up and down buttons at the same time (the three buttons are together at this time) until the Chinese recovery mode is entered. Will enter the mode as shown in the figure:
Ok, do the above steps, and then enter the key to our answer, which is the root permission you want.
Root is the nerve center of mobile phone, which can access and modify almost all files of your mobile phone. These things may be things that mobile phone companies don't want you to modify and touch, because they may affect the stability of mobile phones and are easy to be hacked by some hackers (root is a super administrator user account in UNIX systems such as Linux. )
"root" is the highest administrator in the Android system, and getting it means that you can control any function in the system at will. The manufacturer will not configure root permissions for the mobile phone. Note: It is risky to get root permission, so don't try it casually.
To get root:
1, according to the above method, brush into the Chinese recovery card brush module, and then enter the Chinese recovery mode;
2. After entering the recovery mode, you will see the penultimate option "Get ROOT permission", select it, and then restart the phone, and your A820T will get ROOT permission.
By the way, introduce recovery:
What is China recovery? Recovery is actually a boot program, which can be used to restore factory settings, clear the data of wiping the mobile phone, or use it to brush the computer, which is equivalent to the pe of the computer, and even use it to obtain ROOT privileges. ...
The specific functions of Chinese recovery are:
1. Brush system: the newly downloaded rom is directly placed on the sd card, and you can brush it without booting into the system!
2.android system and data quick format (wipe)
3. Some advanced settings, such as clearing battery information.
4. Powerful USB flash drive installation function
5. Press the volume+and the power-on key to enter the power-off state.
6. The backup and recovery system includes all data of data;