Please make sure your device meets the game system requirements to install the latest version of the game.

NOTE: Before you update, please make a backup of your device using iCloud or iTunes and make sure your game is being saved online.

Here is how to update your iOS:

1. Plug your device into power and connect to the Internet with Wi-Fi.
2. Tap Settings > General > Software Update.
3. Tap Download and Install.
4. To update now, tap Install.

If there's not enough space to update you can make room for the update by removing content on your device that you don't use. To remove content, go to Settings > General > iPhone/iPad Storage. (in iOS 10: Go to Settings > General > Storage & iCloud Usage and tap Manage Storage.)

If you can’t update wirelessly on your iOS device, you can update manually using iTunes on a computer.

 Here is how to update your iOS using iTunes:

1. Connect your device to your computer.
2. Open iTunes and select your device.
3. Click Summary, then click Check for Update.
4. Click Download and Update.