Windows Phone 7 disadvantages

Windows Phone 7 is latest mobile operating system developed by Microsoft. The User interface in Windows Phone 7 is dramatically changed from previous versions of Windows Mobile operating systems. However it has some serious disadvantages over other latest operating systems like Android OS and iOS 4. Microsoft has removed a few features from Windows Phone 7 OS probabaly for security purposes. However these precautionary measures made Windows Phone 7 an orthodox operating system. (That's what I think). GSM Arena has pointed out following WP7-specific limitations of WP7.

Windows Phone 7 home screen

Windows Phone 7 limitations

1. No system-wide file manager
2. No Bluetooth file transfers
3. No USB mass storage mode
4. Limited third-party apps availability
5. No Flash (nor Silverlight) support in the browser
6. Too dependent on Zune software for file management and syncing
7. No video calls
8. New ringtones available only through the Marketplace
9. Music player lacks equalizer presets
10. No multitasking
11. No copy/paste
12. No DivX/XviD video support (automatic transcoding provided by Zune software)
13. No sign of free Bing maps Navigation so far
14. No internet tethering support
15. No handwriting recognition support