I'm going to buy a Nokia Lumia 1520 at a store in my country. Normally, the store will use some phones, charging all the time (without inserting the sim card) for customer testing.
Nokia Lumia 1520 is now quite rare in my country, so how can I check if the one I'm gonna buy is not a testing one? I don't know if they don't insert the sim, whether or not we can check it?
This phone is suitable for my work, my style, I really like it, so please help me.