How to remove the small tick *#558# in the engineering test of vivo mobile phone?

If it means that there is an engineering mode on the desktop, please refer to the following methods:

1. Press and hold the "Project Mode" icon on the desktop for 3 seconds to close it;

2. Try to forcibly restart the device.

① Models of tablet PC, Funtouch OS 3.2 and subsequent systems: Press and hold the "Power button" and "Volume Down button" for more than 10 second at the same time;

② Press and hold the top round key 10 second or more to forcibly restart the phone (NEX 3/NEX 3S is applicable);

③ System model before ③Funtouch OS 3.2: Press and hold the "power button" for more than 12 seconds.

3. Connect the power supply, enter the recovery mode-install the system software-confirm the latest version of the network update-download and install the latest version, and connect the available WiFi-download and install-wait for the installation to be completed, and then restart;

4. After backing up important data, enter Settings-System Management/More Settings-Backup and Reset-Clear all data.

Note: Clearing all data will delete all data stored internally (except SD card data), including installed applications, contacts, short messages, files, etc. You can use this recovery when a serious exception occurs and there is no other way to solve it. Please use it with caution.

Important data is backed up by cloud services before operation.

Enter the mobile cloud service-device cloud backup-backup data type-turn on the switch that needs to be backed up-return to the previous page-click Back Up Now;

If you still can't quit after the above operation, please go to vivo customer service center for processing.

Note: In order to save valuable time, it is recommended that you call the service center in advance to confirm the business hours of the service center and whether the spare parts inventory is sufficient.