unlock country code

If you are referring to carrier unlock, you will have to contact your carrier. Apple does not unlock phones.

Again, there is no "unlock" code. You must contact the carrier that the phone is locked to. Apple DOES NOT unlock SIM locked phones.

How to unlock your iPhone for use with a different carrier

Unlocking your iPhone means that you can use it with different carriers.

Your iPhone might be locked to your carrier. Unlocking your iPhone means that you can use it with different carriers. To contact your carrier and unlock your iPhone, use these steps. 

If you don’t want to switch carriers and your device is locked because you forgot the passcode, then you don’t need to use the steps in this article. Learn how to reset your passcode.

Apple can't unlock your iPhone for use with a different carrier. Only your carrier can unlock your iPhone.

Contact your carrier

1. See if your carrier offers unlocking. Only your carrier can unlock your iPhone.
2. Contact your carrier and request an unlock. Your account might need to meet requirements for unlocking. After you submit the request, it might take a few days to complete. To get your request's status, contact your carrier.
3. After your carrier confirms that they unlocked your iPhone, follow the steps below. 

If you have a SIM card from a carrier other than your current carrier

Use these steps to finish unlocking your iPhone:

1. Remove your SIM card and insert the new one. 
2. Set up your iPhone again.

If you don't have another SIM card to use

Use these steps to finish unlocking your iPhone:

1. Back up your iPhone.
2. After you make a backup, erase your iPhone.
3. Restore your iPhone from the backup you just made.

How to unlock your iPhone for use with a different carrier - Apple Support

https://support.apple.com/en-us/HT201328

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This is Apple Support Community forum, for user to user interaction for information & idea sharing between users, if need be, extend support on technical knowhow in handling Apple products from more experienced fellow user, Apple Inc is neither here nor they are listening. 

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For these questions, you may contact Apple Inc or your local Authorised Apple vendor directly. 

Thank you for your understanding and support.

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