Telecoms giant Telefónica has published results for the first quarter of 2012, including details of the O2 network run by Telefónica UK.

O2 UK ended the quarter with 22.3 million mobile customers, having seen ‘pay monthly’ contract customers increase by 5% to account for 50% of the total mobile customer base. However quarterly revenue fell by 6% year-on-year to 1,719 million Euro, blamed on a difficult trading environment and mobile termination rate cuts.

With Facebook’s stock market flotation expected to go ahead next week and a company value of between $77 billion and $96 billion being anticipated, the social network is putting the finishing touches to its paperwork.

It’s just filed an amendment to its original registration statement in which it warns that the increasing use of its mobile services may cause a problem.

It looks as though the market for mobile payments is getting increasingly competitive.

Stockholm-based iZettle, which lets iPhone and iPad users accept payment from ‘chip and PIN’ cards via a plug-in card reader, has just eliminated its fixed transaction fee of 15 Euro cents per transaction. Consumers taking payments on their iOS device now just pay 2.75% of MasterCard, Visa or Diners Club card transactions or 3.75% of American Express transactions.

People with tablets shop more on their devices than PC and smartphone users, according to new research from mobile advertising network InMobi and mobile marketing agency Mobext.

The new report, entitled ‘The Role of Tablets in the Consumer Sales Journey’, contacted more than 8,400 people worldwide. It found that 69% of tablet users had shopped via their device in the last 30 days.

In-car navigation provider TomTom has announced that Research In Motion is using TomTom’s data for its BlackBerry Traffic, BlackBerry Maps and BlackBerry Locate services. It means that the BlackBerry Traffic application now offers real-time road information from TomTom HD Traffic.

In addition, developers can include TomTom mapping and traffic information in their own apps.