No parts have been changed. The screen is original, and the phone has no issues. It is in new condition with a protective film on the back. The original screen protector applied at the time of purchase is still on. The phone works perfectly, and you are welcome to inspect it thoroughly before buying. Please do not negotiate unnecessarily if you are not genuinely interested. I offer a return policy if any problems arise within one week, and I will provide a photocopy of my NID. Interested buyers, please reach out.