here is the metal slim case on black. personally i prefer quicksand instead of transparent.



this is yesterday haul for car...

powerbank ( OEM one la, so far so good )
car holder ( was finding the air vent one but end up find the suck up on glass type)
and a stereo bluetooth headset , sony SBH20   

S_OFF offerv you mose flashing options and is better in case you need to claim warranty ; your phone in fastboot mode will not show TAMPERED
Is quite straightforward process - probably you miss or mistype some words at terminal when keying in

I quote to you from one of the website :

In a nutshell, S-OFF means that the NAND portion of the device is unlocked and can be written to. The default setting for HTC’s devices is S-ON, which means that neither can you access certain areas of the system nor can you guarantee a permanent root. Furthermore, signature check for firmware images is also ensured by the S-ON flag.

In their devices, HTC have installed a sort of security check whose level is determined by S-OFF/S-ON. Essentially, this security level is a flag stored on the device’s radio that checks signature images for any firmware before it is allowed to be written to system memory. This hinders using any custom ROMs, splash images, recovery etc., and also restricts access to the NAND flash memory. However, when security level is set to S-OFF, the signature check is bypassed, allowing a user to upload custom firmware images, unsigned boot, recovery, splash and HBOOT images, as well as official firmware that has been modified, this enabling maximum customization of your HTC Android device.

Furthermore, S-OFF also reduces restrictions on accessing the NAND flash memory on the device, allowing all partitions (including /system) to be mounted in write mode while the operating system is booted.

http://www.engadget.com/2013/07/02/htc-con...ndroid-updates/

HTC confirms one s no longer receive android updates