3 is close to 500,000 UK mobile broadband customers.
It said last week it had one million customers signed to mobile broadband contracts, equipped with USB dongles, across Europe. Half of its mobile broadband base is in the UK.
3 UK chief executive Kevin Russell said voice traffic had fallen on its network 20 per cent as a result of high termination rates, but that data traffic is through the roof.
“We pay out £190 million per year to subsidise the other network operators as a result of the new termination rates, which have had the effect of increasing our payments to other networks," said Russell.
“Therefore, we have had to put our prices up. As a consequence of putting prices up, we have seen a 20 per cent fall in voice minutes on our network. However, our data usage is up 600 per cent.”