Those details will provide you with the exact phone specification, so you are sure the particular model is not some kind of clone or replica.
That info allows you to determine the exact type of guarantee and the countries in which it applies. You do not have to look for the documents and wonder if your device is still under warranty protection.
The exact start and end dates of the warranty will no longer be an issue for you thanks to those tabs.
The detailed sequence of digits and the signals which is applied to the particular service can be found just under these headers.