Mark Bridge writes:

Sadly we’re ending the week with yet another natural disaster. Barely two weeks after New Zealand’s earthquake comes news of Japan’s biggest quake in living memory.

Still, I’m here to talk about mobile phones, so – after a quick mention of the great work being done by the Red Cross – I’ll get on with it.

This week's edition of The Fonecast covers everything from the new iPad to O2's new content restrictions, from Android malware to Facebook messaging… and from mobile radio to Iain Graham rapping.

No, that's not a mistake (except in the artistic sense, perhaps). We really are talking about the same Iain Graham who hosts our podcasts.

Nokia has launched a new budget-priced music phone that's intended to retail at around £30. However it looks as though the Nokia X1-00 is destined for developing markets rather than the UK, with initial availability expected from next month.

The Nokia X1 is equipped with a large rear-mounted loudspeaker rated at 106 phon; loud enough to rattle window frames!

Internet radio service we7, which counted tech-savvy musician Peter Gabriel as one of its founder investors, has launched a free mobile radio app that lets users create their own personal radio stations. However, unlike competing services, these channels can work with or without an internet connection.

we7 Radio uses buffering and caching to take advantage of WiFi or mobile data connections when they're available, storing music tracks to play them when on the move.

A new report from Juniper Research says the worldwide Mobile Entertainment market was worth $33 billion last year, with this figure expected to reach $54 billion in 2015. It says the rise will be driven by smartphone adoption and an increase consumer-oriented application downloads.

The combination of app stores and smartphones are described as having created 'an unprecedented level of awareness and usage of services' including social media, games, video and streamed music.