HTC has announced that its smartphone HTC Sensation in August, a firmware update that makes it possible for the bootloader to open. In september, the manufacturer will this ability actually activate.
The opening of bootloaders is a recent change in the strategy of HTC. A number of months back the company announced yet to the bootloaders to encrypt. This makes it impossible for users to their devices with custom firmware. After the predominantly negative reactions of users was HTC back on that decision.