GSM operators worldwide will now be able to get more from limited spectrum and improve their overall Quality of Service (QoS). Nokia Siemens Networks has launched a unique Dynamic Frequency and Channel Allocation (DFCA) feature that can double GSM network capacity within existing spectrum. The feature supports growth, while maintaining service quality and controlling costs.
I guess this is one of the reason why you can never go wrong with a Nokia handset. Because they do not only build handset, they also build the infrastructure for it. =)