As O2 UK announces its successful 4G LTE trial, TeliaSonera is launching commercial 4G LTE services to customers in Sweden and Norway – which it says makes it the first network operator in the world to offer a commercial 4G service.

The services cover the central city areas of Stockholm and Oslo and will be used for mobile data.

This week we talk to Shazam CEO Andrew Fisher about the mysteries of mobile music discovery. And, as usual, there's a look at the week's mobile industry news - from T-Mobile's data leak to the launch of O2-backed virtual network giffgaff.

Vodafone has announced Vodafone 360, an online aggregator that puts all your friends, web communities, entertainment and personal favourites together on your phone or PC. For example, it combines contacts from compatible mobile phones with friends on Facebook, Windows Live Messenger and Google Talk to create a single address book called Vodafone People.

There’s also going to be an app store called the Vodafone Shop.

Mark Bridge writes:

Marketing, not unlike football, is a funny old game. I don’t claim to be an expert in either… but every so often something happens that starts sowing the seeds of doubt in my mind. And no, I’m not thinking about Liverpool's penalty claims in Sunday’s game at Tottenham. I’m thinking about Blyk.

Here at The Fonecast, we like Blyk. They shook up the industry and worried some of the big names when they arrived with their youth-focussed virtual mobile network two years ago. We interviewed their MD Shaun Gregory in May last year. And now they’re quitting the MVNO game in favour of arranging advertising deals for networks.

The Organisation for Economic Co-operation and Development says Finland, the Netherlands and Sweden have the lowest prices for mobile phone calls among its 30 member countries.

The highest mobile call charges were according found in Canada, Spain and the USA.