Modern iPhones will display a "Parts and Service History" in the settings if the screen or battery has been replaced with non-genuine components.
To ensure a successful purchase, a buyer must verify several technical "red flags" before handing over any money:
Check the Battery Health percentage in the settings. Anything below 80% will likely require a replacement soon, which should be factored into the negotiation.
Run the device’s IMEI number through an online database to ensure it hasn't been reported stolen or "blacklisted" by a carrier for unpaid bills. Conclusion