Hello, Absolutely, it's new. At the time of writing, we have no second-hand stock of this item. :)

There is no fixed price, so it may be more expensive or cheaper in another shop, even if it is the manufacturer itself. This is a brand new device, so you don't have to worry.

Here are the answers to your questions. 1. yes, you can use a Portuguese sim card. 2. the 4GB or 6GB is memory. The amount of RAM also affects how many apps can stay open in the background and how fast they launch. The 6GB is only available on the iPhone 13 Pro and Pro Max, but unfortunately not on the iPhone 13. 3. you have 2 years warranty if you buy the iPhone from us. You can contact us in warranty cases.