Why can t Lenovo A3800 D flash the phone, can t root

Lenovo A3800-D official flashing method is not to use root operation, but due to the risk of self-flashing, if the failure leads to the failure of the device, it may affect the normal warranty service of the product, it is recommended to contact the repair station to let the engineer assist in flashing the operation, if you are willing to bear the possible risk, you can go to the Lenovo official Lewen bar firmware area**Official firmware and detailed tutorial, according to the flashing tutorial to try to operate.

In addition, the root method varies depending on the version of the machine, so it may not be possible to obtain it with some tools. And after the phone obtains root permission, the security level of the mobile phone system will be reduced, which poses a hazard to the mobile phone, may cause unpredictable phenomena such as crash and black screen, and the hardware damage caused by root is not warranted, and root is not recommended.

Hello. I'm sorry, but if it is an abnormal problem that the device cannot be turned on after obtaining root, it may usually be due to the loss of system files caused by related misoperations, which can not be repaired directly, and needs to be flashed.

Due to the risk of flashing the machine by yourself, the failure of flashing the machine may affect the normal warranty of your equipment, so we do not recommend that you flash the machine by yourself, you can choose to go to the local after-sales site to let the engineer assist in processing.

You can access:

Find the nearest site. The business hours of the maintenance site are usually from 9:00 to 18:00 from Monday to Sunday, except for holidays, and the stations will be slightly adjusted according to their own operations.

You are welcome to contact us or visit Lenovo at any time

Consult to find out.

1. After the mobile phone successfully obtains the highest authority, it generally cannot enjoy the quality three-pack service normally, the main reasons are as follows:

1. Root permission is the highest permission of the Linux system, and you can do a lot of harmful behaviors to the system and even hardware after obtaining permission.

2. The root permission is not opened by default, in order to make the mobile phone system get more security guarantees, because there is no root permission if it is not missed, the damage caused by malware will be minimized, and if there is a problem with the mobile phone system, the merchant is also convenient to repair.

Second, you can try to flash back the official firmware to meet the warranty conditions.

Tools Raw materials.

1. Ensure that the mobile phone has sufficient power (more than 70%);

2. Back up personal data (contacts, text messages, apps, etc.) in your phone;

Method steps: 1. First, copy the firmware package to the root directory of the mobile phone memory card.

2. In the shutdown state, press and hold the power button and the volume down button at the same time, after about ten seconds, yellow letters on a black background will appear on the screen, which means that the phone has entered the recovery mode to search for segments.

3. Use the volume up and down buttons to move the cursor to the "Manually select installation package" position, and click the power button to confirm. Next, use the volume up and down buttons to select the installation package, and click the power button to confirm.

4. Just wait for it to be done by yourself, the phone will always keep the screen lit during the flashing process, in addition to the scrolling yellow text, there is also a blue progress bar scum displayed below the green robot. The words "Installation Completed" will be displayed at the bottom of the final screen, the flashing is completed, 5. Select Reboot the system immediately according to the prompts, and it is complete.

If you can use the root sedan car to call the root master, but the root is not warranted after the root, I have a suggestion, that is, the one-click root big Bucha division has a backup and restore closed field function, your root money is backed up first, and then restored back after sale, but there is no guarantee that it can be found.

Dear users, hello!

This is the knowledge base of Lenovo's frequently asked questions, and there are more complete answers and know the process of wisdom and analysis: