Yesterday morning City of London Police arrested nine people as part of an investigation into a suspected fraud case that's believed to have involved premium-rate international phone numbers being called on mobile phones. Officers also seized up to £15,000 worth of mobile phones along with hundreds of SIM cards and fake documents. The raids took place after an investigation in partnership with O2.

This year's Communications Market Report from telecomms regulator Ofcom has revealed a surge in smartphone ownership. In June 2010, 26.5% of people in the UK said they had a smartphone, more than double the number two years previously. Growth in the last 12 months was particularly strong, up 81% from 7.2 million users in May 2009 to 12.8 million in May 2010.

Mark Bridge writes:

The adage that “the customer is always right” has apparently been disproved by a recent survey of mobile phone users.

Mobile News reports that virtual networks Virgin Mobile and Tesco Mobile outperformed their network partners in a recent customer satisfaction survey carried out by research firm YouGov for price comparison website uSwitch.

With smartphone security hitting the headlines this month, The Fonecast talks to mobile security expert Jack Wraith, who heads the Telecommunications UK Fraud Forum and the Mobile Industry Crime Action Forum. He explains what the problems are, how consumers can protect themselves… and what the industry can do to help.

Plus, as usual, there's a review of the week's other major mobile industry news. Oracle, Google, JAG, Yes Telecom, Vodafone, O2, Motorola, Qualcomm, Nokia, BlackBerry and – rather tenuously – Catherine Zeta-Jones's bottom are all discussed by Iain, James and Mark.

James Rosewell writes:

Yesterday I received the following text message from O2: “You’ve gone over your data allowance on your mobile. You need to cut down or get a bigger Bolt On to keep using the internet.” I thought this was strange as I’ve an unlimited data bolt on applied to my O2 UK contract so I decided to telephone O2 customer services to find out a little bit more. Here’s what happened.