ne rivals Vodafone Group Plc and mmO2 both said here that they do not expect a mass market for new high-speed Internet services, the so-called third generation (3G) technologies, to emerge before 2004.The hope is that 3G, allowing functions such as video streaming, will fuel a new era of growth.Things could look very different by 2004, with most players conceding that six rivals are too many in a