To open Game Center on your iPhone, go to the "Settings" app and scroll down to find "Game Center." Tap on it to access your Game Center profile, where you can sign in or manage your account settings. Additionally, you can open Game Center directly from supported games that utilize the service. If you're using iOS 10 or later, keep in mind that Game Center is integrated into individual games rather than having a standalone app.
Open game center, goto games tab, tap "find game center games."
Yes
The Iphone
Yes
if you have an iphone 3gs or later then you have it. other wise you dont have it.
you dont
You can't as it comes as part of the default package of the iPhone
While holding the HOME button on the LARGEST IPHONE in the game, press the HOME button on YOUR iPhone/device. Your game will minimize which is normal. Open the game again and the door will open. See related link for screenshots.
If you delete the game it will ask if you want to keep or remove it from your game center.
Why's it matter? Get a life and get off the Iphone bro....
Game Center comes with iOS 4. You do not need to download the app. You are also unable to delete it so enjoy it.
While holding the HOME button on the LARGEST IPHONE in the game, press the HOME button on YOUR iPhone/device. Your game will minimize which is normal. Open the game again and the door will open. See related link for screenshots.