Lenovo S890 system upgrade to Android 4 1 Unknown error is going on

We apologize for the inconvenience.

If there is an abnormality during the system upgrade of your device, please check the following methods:

3. If your device system settings can switch --- default storage location in storage, please switch it to a built-in memory card before upgrading.

4. If the above operations are invalid, it is recommended that you back up your data for factory reset operation and then upgrade again, to rule out whether it is caused by system abnormality, if it still cannot be improved, please go to the Lenovo maintenance site in time for testing, and it can be solved by flashing and upgrading;

5. It is recommended that you recall whether the device has been rooted or modified system file operations, if similar operations have been carried out, it may affect the ** upgrade function, it is recommended that you go to the maintenance station to upgrade by flashing the machine to solve the problem.

Lenovo authorized after-sales site inquiry.

We apologize for the inconvenience.

If the call history in your device is frequently lost, we recommend that you try:

1.Restart the device and make an observation attempt.

2.Please go to "System Settings - Applications" and select the address recorder process to clear the data to try to rule out the program abnormality.

3.It is recommended to back up the data for a factory reset attempt;

If the above methods cannot be improved, it is recommended that you send it to the repair site in time. At the same time, it is recommended that you use cloud services (or other software) to regularly back up important information such as contacts and text messages in the device to avoid inconvenience caused by misoperation or abnormality. Lenovo authorized after-sales site inquiry.

It must be a software problem.,Or you deleted the necessary programs that run on the system by mistake.,Use a line brush.,Re-flash will definitely be good!

Me too, I don't have a call log, and now I regret it, I really shouldn't have upgraded, and a lot of things are gone.

Mine is also like this, the customer service said that it was a system disorder, I am like this every time I turn on the fast boot, and then turn off the fast boot and it's fine, you can try it.

I've just bought it for more than a month, but it's really good to turn off the fast boot, and I don't know what's going on.

This is the case with mine too, restarted several times and it's fine again.

No, it is less than 4 months. The horn is broken.

I'm sorry, because there is a certain risk of rooting, and it will cause the phone to lose its warranty, the official does not encourage users to obtain root access by themselves, please understand. At present, we do not provide root-related technical support, please consider carefully to avoid unpredictable negative results caused by improper operation.

Try all the one-click root software on the Internet, it should be able to be rooted.

Whether you are through**upgrade, it is recommended that you further check the steps of **flashing, after the mobile phone is connected to the Internet, enter the system settings - about the mobile phone - system update, to **upgrade package, confirm that the mobile phone will automatically restart after the immediate upgrade, if you enter the upgrade interface, automatic upgrade, and later complete the work of **talk about lead upgrade, the process is not to manually operate the mobile phone to upgrade.

If you are prompted that the system update failed, it is recommended that you restart your phone, go to the internal memory card (external memory card) - googleota folder, delete the file and try again

3. Conflicts of some third-party software in the system. Take a look after a simple factory reset of your phone.

4. Please verify whether the phone has been rooted before, which affects the operation of the **upgrade. If so, it is recommended that you take the time to bring your warranty card or invoice to contact your local repair site to upgrade your system by flashing it. Inquire about authorized maintenance sites on the official website.

ps:There is a risk in flashing the machine by yourself,Failure to flash may lead to mobile phone failure and loss of warranty service,The official is not recommended to operate this way,If you still have your own needs to flash,Willing to bear the risk of flashing,Personally, I suggest that you can go to Lenovo Lewen on the **firmware flash by yourself,Related links。