It upgraded Windows Mobile from 6.5.1 to 6.5.2 (which improved both the stability and usability of the device), it brought in the use of video telephony, and an FM radio and it introduced fast GPS to get a quicker fix.

Despite that MR2 was undoubtedly a move in the right direction, most of the users who send their feedback on the official Sony Ericsson product blog, developer forums and Sony Ericsson fan sites continue to complain that even after MR2 device is still unstable and lacks some key features such as support for Bluetooth remote SIM access (rSAP) profile which make X2 unable to pair with any modern premium car kits which are built into Mercedes, BMW, Audi, Skoda etc.

– an essential feature for business users and executives who were intended to be the main target customers for the handset.

This decision from the Sony Ericsson management was an unfortunate move, because the phone still contained multiple bugs that made life difficult for its users.

The phone still contains a serious bug that corrupts the SD-card's content, and makes it an unreliable tool for business-users.