The publication adds that UK sales in the first two weeks following launch of the device crossed 50,000 per week.
Marketshare is believed to be hovering between a 4% and 6% share of the UK handset market, and even reaching ‘high single digits’ some weeks, according to a source close to the matter.
And in order to maintain the momentum, Apple and O2 have introduced the device on a pay-as-you-go basis. First-week sales of the 3G iPhone racked up around 50,000 units despite the systems faults, but those levels dropped to 32,000 after the first month.
An O2 spokesperson said: "We have a strong relationship with Apple and they are pleased with the sales of the iPhone to date."