Can i get the 6 digit code at setting up the phone after finishing the setup

Hi MohsenShebl,

The six digit code you're referring to is likely the two-factor authentication code. To clarify are you prompted for it when trying to sign in with your Apple ID?

If so, and your number hasn't changed, you can receive the code via text message.

"Get a text or phone call

If you don’t have a trusted device handy, you can have a verification code sent to your trusted phone number as a text message or phone call.

1. Click Didn't get a verification code on the sign in screen.
2. Choose to have the code sent to your trusted phone number.
3. You'll get a text message or phone call from Apple with your verification code. This text message might include an additional domain validation line. This line includes the @ symbol, the website name, and your code (for example: @icloud.com #123456 %apple.com).
4. 
5. Enter the code on your other device to complete sign in."

See other options to get a verification code such as using a different device or via Settings in iOS here:

• Get a verification code and sign in with two-factor authentication

Cheers!