via IMEI or Serial Number
How To Get IMEI?
In settingsGo to: General > About - swipe down to the line with your IMEI
Phone AppOn the keypad enter * # 06 # without space
On iPhone's housingOn the back side of iPhone, look at the bottom of the cover
On SIM card trayUsing a needle, remove Sim Tray from iPhone, small font will be written is IMEI
iPhone iPad FMi iCloud on / off status | iPhone Sim Locked Unlocked status