However, O2 chief executive, Peter Erskine has said he expects sales of the iPhone to maintain the network’s current growth.
Peter Erskine, chief executive of O2, said: "We’re excited about this product and we certainly hope to be marketing it later in the year when it launches."
O2 is the biggest network in the UK after growing sales by 10% in the last three months. The network has also increased margins by shifting more of its pay as you go customers onto monthly contracts.
Erskine also revealed that O2’s broadband offering has been delayed yet again, with a new target of October.