If you are unable to install TutuApp VIP on your device, please click the TutuApp Installer icon, then install the TutuApp Installer to your PC , it will helps you to install TutuApp VIP version to your device.
Connect your IOS device to PC with USB cable, open TutuApp Installer.
Click Install now.
When it shows Finish, please click Back, the installation finished.
If it shows Unable to install, please click Retry.