The usual weaknesses of mobile phones have been associated with overcharged batteries or signal blocking locations. However, the HTC Sensation is also experiencing the grip that got the iPhone 4 crawling slow with weakened performance on streaming, WiFi connection, Bluetooth connectivity, and receiving or recognizing various signals. This happens due to the location of the plastic patches at the inner back part of the phone, being blocked when then hand covers the completely back section of the unit.
Many people have been aware of this scenario in the iPhone 4 that they bought cases for protection and prevention. Nevertheless, this will not work for the HTC Sensation since cases also obstruct signal reception that may have been effective with another unit. While HTC does not have any remedy on reversing this deathly grip, people have to be on the watch on how the speedy mobile phone company will put an end to such madness.
Source: Unwired View