The Global mobile Suppliers Association (GSA) said an increasing number of mobile operators are now using channels in the 2.1 GHz band (3GPP band 1) for the delivery of 4G/LTE-based mobile broadband services, either as a single band deployment or as part of multi-band LTE Advanced networks enabled by carrier aggregation technology. An LTE2100 report by the GSA said 15 operators in 11 countries have commercially launched LTE systems and services using 2.1 GHz spectrum, almost double the number of networks launched compared to one year earlier. In this way operators are able to boost LTE network performance and data speeds. The GSA noted that the main infrastructure vendors all offer LTE2100 solutions. The 2.1 GHz band has typically been used for 3G systems deployments in many regions of the world, but several regulatory authorities have facilitated the use of 2.1 GHz spectrum for 4G systems by adopting a technology neutrality policy. Release