Palm has issued updated financial guidance today, warning that revenues for the third quarter of its financial year are being "impacted by slower than expected consumer adoption of the company’s products that has resulted in lower than expected order volumes from carriers and the deferral of orders to future periods".

More information is expected next month when there's a formal announcement of third-quarter financial results.

VoIP service Skype says it's removing Skype for Windows Phones and Skype Lite from its download page. Although customers who've downloaded the applications will still be able to use them, the company says it's discontinued them because "neither of these apps offered a great Skype experience".

As part of the annual financial results released today by Deutsche Telekom, T-Mobile UK has also announced its full-year results for 2009.

The company's total customer base grew by 2.3% year-on-year to 17.178 million, with a net total addition of 392,000 customers. The fourth quarter saw 570,000 net customer additions, giving T-Mobile UK its best-ever December. Contract customer numbers rose 0.4% over the year to 4.1 million; the prepay customer base grew 3.0% y-o-y to 13.1 million.

Total revenue for the year was £3.0 billion, down from £3.2 billion in 2008, with the drop blamed partially on lower termination rates. Data revenue was up over 40% and is now a quarter of the company's ARPU.

The security of 3G and GSM mobile phone calls has been questioned recently. Mark Bridge spoke to Dr Simon Bransfield-Garth, Chief Executive of Cellcrypt, at Mobile World Congress to find out how real the problems are. The interview was included in our podcast on 19th February 2010; here's an edited transcript of the interview: