AppleTV for new iPhone on 3months

It requires you to activate it.

See: Get Apple TV+ - Apple Support

1. Open the Apple TV app. If you're using an eligible Apple device, a message might ask you to to redeem your Apple TV+ promotion.
2. If you can't redeem your promotion, make sure that you're eligible.
3. Select the Apple TV+ Originals tab.
4. Select Sign In and Start Free Trial. Or you might see a Get Apple TV+ button or Start Free Trial button.
5. Sign in with the Apple ID and password that you use to make purchases.* If you donʼt have an Apple ID, select Create New Apple ID, then follow the steps to create one. Forgot your Apple ID?
6. If asked, confirm your billing information and add a valid payment method. Then select Confirm. If asked, agree to the terms and conditions.

* If you can't to subscribe to Apple TV+, you might need to get your Apple ID ready for purchases.