Mobile World Congress is underway in Barcelona, showcasing the latest innovations in mobile technology and services at the world's largest exhibition for the mobile industry.

The 2009 event is expected to attract 50,000 attendees, keen to experience the newest and most important trends in mobile communications. Microsoft, Nokia and Sony Ericsson have already made major announcements, and there will be plenty more to follow.

Here's all the latest news from the showfloor:

SanDisk touts Service Delivery Card at MWC
Mobile network operators offered access to local storage on the handset

VIDEO: Mobile World Congress round-up
The highs and lows of this year's MWC in Barcelona

VIDEO: Porsche P'9522 phone demo
A look at the first 'candybar' mobile from the prestige car maker

VIDEO: Palm Pre demo
A look at Palm's forthcoming touch-screen smartphone

Yahoo stakes a claim on the mobile web
Yahoo Mobile launches today with new features for on-the-go surfers

Acer unveils Tempo smartphones at MWC
Four Windows Mobile handsets, including a dual-SIM model

VIDEO: Nokia E75 demo
A look at the latest addition to Nokia's E-series

Mobile industry agrees on standard charger
Energy efficient micro-USB chargers to become the norm

GSMA and Gates Foundation target the 'unbanked'
Partnership aims to bring financial services to developing countries via mobile phones

Nokia phones to integrate Skype
N97 first to get VoIP and messaging client built in

Nvidia showcases Android running on Tegra
Google's open source OS gets another follower

Adobe gets Flash at Mobile World Congress
Firm tries to make its mobile Flash offerings more like the desktop experience

LG promises energy efficient phones
Manufacturer teams up with Qualcomm and Intel

Mobile manufacturers express security fears
Malware infections on the rise, warns McAfee report

HTC shows new Touch phones at MWC
Touch Diamond2 and Touch Pro2 can be upgraded to Windows Mobile 6.5

Microsoft unveils Windows Mobile 6.5 at MWC
Update adds new-look user interface alongside application store and online backup service

Nokia unveils Ovi Store and new phones
E-series gets a boost with E55 and E75

Sony Ericsson unveils Idou touch-screen smartphone
Phone maker also reveals new brand direction at Mobile World Congress

O2 Litmus apps store links developers and users
Web site lets users get involved in apps testing and development

Samsung to unveil solar-powered mobile
Blue Earth touch-screen phone features integrated solar panel and is made from recycled plastic bottles

Genband backs large-scale femtocell rollouts
Uptake is integral to development of Long Term Evolution mobile broadband standard

Phoenix extends BeInSync to mobile phones
BeInSync Mobile synchronises photos, music, calendar and contacts to the web