Lenovo A3500 mobile phone system upgrade failed

Hello. We apologize for the inconvenience.

1. Please confirm whether the network is unstable or the connection is abnormal (see Wifi network abnormality.)

For details about GPRS network exceptions, see :

3. It is not excluded that the corresponding SD card is abnormal, at this time, back up the data on the corresponding SD card, and then format it for comparison; At the same time, you can also change the storage location and use the observation;

4. Back up your mobile phone information and restore factory settings;

b. Failed to install the upgrade package in the system

1. It is recommended that you go to System Settings - Storage to check whether it is due to insufficient storage space;

3. Back up your mobile phone information and restore the factory settings;

If the problem persists after the above operations, it is recommended that you go to the site in time to do the corresponding flashing upgrade operation, please understand.

Lenovo Authorized Repair Site Query:

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.

If you have other questions in the follow-up use process, you are welcome to contact us at any time or visit Lenovo Lewen (

Consult to find out.

Under normal circumstances, go to the "System Settings - Storage" of the mobile phone to switch the default memory card to "Internal Memory Card", and ensure that the space is enough to store the upgrade firmware package file of **.

Then under the wifi network, go to the phone's "System Settings - About the phone - System Update" below, **Firmware - Upgrade Now - Restart the phone automatically, and the upgrade will be completed after a few minutes and enter the system desktop.

There is no special risk in this step, you can upgrade with confidence, and ensure that the phone has enough power during the upgrade process.

If the upgrade still fails, it may be caused by the previous system abnormality, you can try to restore the factory settings of the phone first (pay attention to back up important data such as body contacts, text messages, etc.), and then try to upgrade.

Due to the risk of flashing the phone by yourself, the failure of flashing will affect the warranty of the mobile phone, so it is recommended that you can take the time to upgrade the system at the local Lenovo after-sales service center.

1. All are welcome to contact us at any time or visit Lenovo Lewen (for consultation and understanding.

You are welcome to contact us at any time or visit Lenovo Lewen (for consultation.

Dear users, hello!

This is the Lenovo FAQ knowledge base, which has a relatively complete answer and know the process and analysis:

Method 1: Card swiping: Use a memory card (SD, TF, etc.) to flash the machine, card swiping process:

3. Shut down, remove the SIM card, install the memory card, and it is recommended that the important things in the memory card should be backed up.

4. When shutting down, press the power button and the volume plus button at the same time, about ten seconds, and then let go.

5. Enter the recovery mode, i.e. REC mode.

6. Select Wipe Cache Partition to clear the cache.

7. After cleaning the cache, select Wipe Data Factory and restore the factory settings.

8. Select "Install Zip from SDCARD", the power button is OK, then select Apply SDCARD:update, and the power button is OK, that is, select the flash package from the memory card to flash the machine, and wait patiently for it to be completed.

Method 2: Flash the software.

Preconditions for flashing, two: the mobile phone has sufficient power, and it is recommended that more than 50% of the battery remains.

Ensure that the internal storage of the phone or the external SD card of the mobile phone has at least 100M or more remaining capacity than the ROM package.

Step Method:1Connect your phone to the flashing master.

3.Perform rooting.

Data backup, 5Click on "More Tools" and select "Backup Master.""Make a data backup of your phone. Select the ROM package, select the flash package or click on the ROM base in the flash master, then click on the popular brand on the left, search for the required installation package, click in to see the ROM package.

6.One-click Zhenbi flash,Ready ROM,Start one-click flashing,Before flashing starts, the flashing master will check the phone and the flashing package,Click "Browse" to select the best ROM just now,Don't forget to follow the prompts to back up contacts、SMS and applications。

After entering the "one-key flash" mode, the device will enter the automatic flashing mode, and after about 5-15 minutes, you can complete the one-key flashing, please be patient.

Wait patiently for a few minutes and the flashing will be done automatically.