MG7J3LL/A is the phone original

It looks like that model corresponds to an iPhone 12 Mini 64GB.

If you'd like, check its coverage using its Serial or IMEI number here:--> Find information about your warranty or AppleCare plan - Apple Support

Regards

Giulio

🇮🇹

gett-money wrote:

Is the phone factory unlocked?

It is not possible to determine that from a model number.

Do you not know what you have purchased?

🇨🇦

That shows as an iPhone 12 Mini for the US market.