To use the Samsung Galaxy A7 (2018) to make phone calls and surf the mobile internet, you need a Sim card. There are different types and sizes.
As a result, not every sim card fits into every smartphone or its sim card slot.
For this reason it is important to know which Sim card the Samsung Galaxy A7 (2018) needs: The Samsung Galaxy A7 (2018) requires a Nano Sim card.
This is currently the smallest format available on the smartphone market and probably the last "fixed" form before the eSim.
If you are still using an older version, such as a standard or micro sim card, you will get a Nano sim card as follows:
Press out the perforation
You have a Sim card with Nano perforation. This is the lightest variant. Simply press the Nano Sim card out of the existing Sim card along the perforation.
Use Sim card punch
You don't have a Sim card with Nano perforation?
For this there are so called "Sim Cards Punchers". A Sim card punch, similar to a punch, cuts out the correct format from your Sim card if it is larger.
Such Sim card punchers are already available for little money on Amazon.
If the effort is too big for you, you can simply request a new Nano Sim card for the Samsung Galaxy A7 (2018) from your mobile network provider.
But keep in mind that this can be expensive under certain circumstances.
You now know the Sim card type your Samsung Galaxy A7 (2018) needs.