You need the for carrier and theft-related checks. You need the Serial Number for warranty and Apple support checks. The best free online tools will ask for either—and cross-reference both against Apple’s official databases.
A clean check means it is not in the shared global blacklist yet. Some stolen phones are not immediately reported. Always pair an IMEI check with a physical inspection and a request to see the seller’s proof of purchase. Check Imei Iphone - Apple Serial Number Free Online
Go to Settings > General > About . You will find the Serial Number near the top and the IMEI (15-digit number) further down under the "Physical SIM" or "Primary" section. You need the for carrier and theft-related checks
If all boxes are checked, you can proceed with confidence. If any single box fails—especially Find My iPhone or Blacklist—walk away immediately. There are millions of clean iPhones on the market; do not risk your money on a problematic device. A clean check means it is not in
Knowing your iPhone's IMEI is essential for several reasons: