Apple ID without a credit card

Your question is not very clear.

Same contacts on Both what?

Not sure if its still possible, but in the past you could create an Apple ID without a payment method by attempting to download a free App from the App Store without having an Apple account signed in on a device.

You can go to Settings ➜ Account ➜ Media & Purchases and sign out, then go to the App Store and try to download a free app. If it still works, it should ask you to create the account and not ask for for a payment method.

Contacts are stored in an email account, be it, iCloud or a 3rd party email. They are not directly tied to your apple Account. You can add the email address that holds the contacts to a device under Settings ➜ Apps ➜ Contacts ➜ Accounts to get the contacts onto that device regardless of what Apple account is signed in in Settings ➜ Account.

You should be able to set up an account without a payment method

How to create a new Apple Account - Apple Support

“Enter your payment method and billing information, then click Continue. You can also choose None. You won’t be charged until you make a purchase.”

but you may find that to do much with the account you will have to show a payment method, at least briefly --> Remove a payment method from your Apple Account - Apple Support

Certain conditions may require you have a payment method on your account:

- What you want to buy cannot be paid for with account balance.

- Sign in with your Apple ID - Sign in to your Apple Account on the web or in your device settings - Apple Support - at the very bottom: "When you sign in to the App Store and other media services for the first time, you might need to add a credit card or other payment information."

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