If you have the box, the Serial Number and IMEI are located on the barcode label. Using iUnlocker and Other Verified Tools
A serial check reveals if "Find My" is active, which could mean the device was stolen or not properly reset by the previous owner. If you have the box, the Serial Number
Always ask the seller for the IMEI beforehand so you can run these checks yourself and avoid buying a "brick." A verified IMEI check against Apple's database confirms
Scammers often sell high-quality "clones" that look identical to iPhones but run modified Android software. A verified IMEI check against Apple's database confirms the hardware is genuine. If the device was a Replacement or refurbished unit
Whether the device is (reported lost or stolen). The Sim-Lock status (Locked or Unlocked). If the device was a Replacement or refurbished unit. Summary of Check Methods What You Get *#06# Settings > General > About Full Details Serial, IMEI, Model Number Apple Support Website Warranty Info Official Coverage Status Verified Third-Party Tools Deep History Blacklist status, Carrier lock info