As with the iPhone 4, it appears the new HTC Sensation has an antenna problem. The statement by HTC in response to said problem sounds quite familiar to the one Apple released way back when...
Every phone experiences a slight variation in signal strength when the antenna is covered in its entirety by a palm and / or fingers. However, under normal circumstances this does not affect the performance of the phone.
So what the hell is going on with this antenna anyway? It seems that in the "death grip" -- that is when someone accidentally covers small patches of plastic on the Sensation's back cover that house the antennaes -- Bluetooth and Wi-Fi radios inside slow down, and weaker hotspots are not recognized by the phone. It appears the problem occurs when a user lays the phone on their palm in a specific way. Check the video below to see: