Lenovo a3900, the phone cannot be turned on. Take out the battery from the phone and put the battery in. The phone turns on by itself and displays the production mode, and then it cannot be turned on

Lenovo a3900, the phone cannot be turned on. Take out the battery from the phone and put the battery in. The phone turns on by itself and displays the production mode, and then it cannot be turned on again.

According to the description, it is recommended to refer to:

1. You can remove the back cover and battery and try to restart. If you can enter normally, it is recommended to back up the body data and try to restore the factory settings. After restoring Before operation, back up some important files stored on the phone, such as text messages, contacts, photos, software, etc., to avoid unnecessary losses;

2. If the above operations cannot be improved, it is recommended to take the time to go for repairs The station will be inspected and processed by engineers to assist.