Mobile gambling refers to gambling done on a remote wirelessly connected device.
These devices can include wireless tablet PC's, mobile phones and other non traditional mid-level networked comuting devices.
Some online casinos and online poker cardrooms offer mobile options.
Mobile gambling requires a data connection to operate and in most cases this data layer is provided by the telecom provider for the region or country.
GPRS, GSM Data, UMTS, I-MODE are all data layer technologies upon which mobile gambling depends.
more info at http://en.wikipedia.org/wiki/Mobile_gambling