7 Write Down Your Serial Number
One of the most important but most easily overlooked things you can do to theft-proof your iPhone is to take note of its IMEI and Serial Numbers. You can easily find these numbers in Settings > General > About. Write them down somewhere secure where they won’t be lost.
Essentially, this is a unique identifier that’s incredibly hard to erase — it’s actually etched into the hardware components of most smartphones. It can help your carrier put your device on a missing phone list and police will ask for it when you report a phone stolen.