There are number of ways to find the MEID or ESN of your device.
Android: Go to Settings > About device > Status
iPhone: Go to Settings > General > About - Enter the first 14 digits only
Windows Phone: Go to Settings > About > More info
ICCID is a unique identification number for the SIM card. ICCID is printed on the SIM card itself and on the cardboard the SIM is attached to. It's a 19 digit number.