Hi Robin,
From last November 2023 i have been using Spigen Back cover for my Iphone 15 pro. In recent days i can feel that the cover has expanded. Can i use this case or can i buy a new one?
Hello bro, that is not normal. if the case fitting is loose then consider changing it. if the iPhone fit is not loose then you may continue using it for few more months.
Also verify the seller rating, user reviews and pick the case next time. that will help.