Game Center is not working on iPhone

Hi rababa64

welcome to this Apple (user-to-user) Community!

Re: "Game Center : my game center does not work ... "

You may need to update your iOS version to the newest available: iOS 18.5

You can check in Settings > General > Software updates.

If iOS 18.5 is already installed : Try restarting you iPhone, and then try again to see if it works.

Else: Wondering what happens when you try ? (error message ? freezes ?)

Perhaps you are missing a step in what is required ... eg: we don't know if you have an Apple Account.

( If you do not already have one, you can create an Apple Account: )

Check you are signed in (in your iPhone settings) with the Apple Account you use for Game Center:

Sign in to your Apple Account on the web or in your device settings - Apple Support

You might want to check through Apple Support's online article below:

See how to: Use Game Center on your iPhone, iPad, or Mac - Apple Support

Eg:

Game Center may just need to be turned on and signed into with your Apple Account.

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Re: " ... and when i download a game it doesn’t work either"

Wondering what happens ... eg: whether or not the game downloads ok / error message ? / won't open ?

Is it a problem with the App Store ? Eg: Apple may require we have a payment method listed in our Apple Account for the first time we use it for downloads even if we only download free apps, games, songs etc.

If the game downloads ok: What you have tried, if anything, to access the game without success ?

(If you are not an Apple Arcade subscriber: : You may need to become one to play Apple Arcade games.)

or

You may find free games in the App Store

All the best :-)