Q: When i sign up to game center,it produces blank screen in the last step.Why will appear this problem?

Hello Zyj66ds,

I'm sorry to hear you are having issues with your Game Center account on your iPhone. If you continue to have issues signing up or signing in to Game Center, you may find the information and troubleshooting steps outlined in the following articles helpful:

Using Game Center on your Mac or iOS device - Apple Support

Get help signing in to FaceTime, Game Center, Messages - Apple Support

Sincerely,

- Brenden