What is IMEI /ESN?
IMEI and ESN numbers are “MAC Addresses” for Smartphones. The number is imbedded in Smartphone at time of manufacturing and cannot be changed. IMEI and ESN numbers are printed inside all Smartphones, typically beside or behind the battery. MobileTalk must use these numbers for each download. ESN MobileTalk must use the DECIMAL ESN number (do not include dots and/or slashes).