O2 has taken steps to future-proof its network by signing an 18-year deal with the Zayo Group.
The mobile broadband provider will take "fully resilient" core fibre-optic network services from Zayo, as it replaces its SDH and Ethernet-based managed services infrastructure.
O2 should benefit from more flexible capacity, as it bids to cope with rising data consumption and demands on its network.
Adrian Di Meo, O2’s Chief Technology Officer, said that with the O2 4G network now covering over 260 towns and cities and half of the UK population, there has been "unprecedented growth" in the amount of data traffic it transmits.
"A year after the launch of our 4G network, it has already carried a total of 5,400 Terabytes of 4G data, which is the equivalent of eight million hours of HD video," he stated.
Mr Di Meo claimed that deploying high capacity core fibre is "essential" when faced with this increase in data traffic.
"The resilience and reliability of our network is important for customers," he stated.