Though windows phones have many advantages, still there are many drawbacks that need attention to hiking the popularity.
These devices are still using dual-core processors when the quad-core, octa core processors are available. They have only 1 GB Ram whereas 2 GB RAM android devices are available. In lower end mobiles, 512 Mb is available making gaming difficult. Its fails in app transformation from iOS and android. Only .mp4, .3gp and .avi video files are supported. They have only one Interface with live tiles at the start of using and the continuous use of same interface will bore the User. You cannot share videos via Bluetooth. There is neither any System Wide File Manager nor any App for this. To access Files you one has to connect to the system. Flash player is also not supported in the browser. There is also no antivirus app to secure the device. It has less number of apps and more expensive as compared with other OS devices. It does not support multi-tasking and USB mass storage. Video and audio downloading is natively restricted and sharing of pre-recorded files via social networking apps is also not possible. Call recording not possible. Can't save numbers directly to contacts from call record. Dedicating a button for Bing is a waste. Day by day increasing other storage. No way to clean it. One hanging application leads to entire phone hang and restart. No privacy features. The only way to protect your personal data is screen lock password. Unable to install app and games on the SD card. These phones lack features like other OS. Manufacturers must try to improve the OS version to make it customer friendly.