Security Firm Lookout has discovered that an Android wallpaper application collects users' personal data and sends it to some mysterious servers in China.
The security firm found that the app in question has been downloaded by anywhere from 1.1 million to 4.6 million users. The app, from Jackeey Wallpaper, collects your device's SIM card number, subscriber ID and your voicemail ID (if saved on your phone).
Still, keep in mind that these sorts of apps can make it into any market, even a highly-policed one like Apple's App Store. Apps have allowed security breaches in the past, such as Aurora Feint the and the CitiBank App.
Still, because of the open nature of Android, there are many more phishing apps floating around.