Security researcher Karsten Nohl has released a software program called Airprobe that makes it much easier for people to test security (and potentially listen to calls) on their chosen mobile network. Airprobe enables users to record and then decode GSM mobile phone calls when used in conjunction with a computer, additional radio equipment and tables of data.

London-based market research company Opinium has been talking to UK consumers following well-reported problems with Apple's iPhone 4. It found that 57% of consumers in the UK were aware of the recent 'Antennagate' iPhone issues reported in the press. 42% of people disagreed with the statement that Apple produces fault free mobile phones and 50% agreed that Apple’s mobile phones are too expensive for what they are.

­Telefónica Europe, which runs O2 in the UK, says revenue reached €7.28 billion in the first half of 2010, up 10.8% year-on-year. It now has a total of 54.5 million customers in Europe, up 6.1% year-on-year. 45.2 million of these are on its mobile networks.

Telefonica O2 UK'S customer base (excluding Tesco Mobile) increased 4.5% year-on-year to 21.6 million at the end of June. The number of 'contract' customers was up 11.7% year-on-year.

Motorola has published results for the second quarter of its current financial year. Net profit was $162 million, up from $26 million year-on-year. Total quarterly sales were $5.4 billion, down slightly on the same quarter in 2009.

The Mobile Devices unit shipped 8.3 million handsets, of which 2.7 million were smartphones. Sales were down 6% on the year-ago quarter to $1.7 billion.

T-Mobile and Three have both started selling the Apple iPhone 4, which means all the UK's major networks now have iPhone 4 deals.

Pricing on Three starts at £30 a month for a 16GB iPhone 4 on a 24-month contract, which costs £99 up-front. The same phone costs £179 on T-Mobile's £30 tariff.