I already had purchased these shoes in red about a year ago at a shoe store and loved them. Well packaged so not to get bent They fir my granddaughter well and she loves the silver stars! If the sensor doesnt detect that the headset is in your ear, it will not announce the caller even if they are in your contact list. I?m no audiophile but after using a bunch of headsets these have sounded the best, and the mic is fantastic to boot, people can hear me nice and clear with no problems. The mic for phone calls completely sucked indoors and outside. It works, looks nice but I would have liked the top part of the case to be more sturdy. I am a 53" not quite so young lady and assembled myself while watching TV. Hope i dont get so unlucky twice I suggest you go for your normal UK size to save returning them.