Failure to do with metal or matte back, probably needs glass
Red Mini mobile bowl stand for eg iPhone 3/4/5 / 5C / 5S, Samsung Galaxy S4 I9500, HTC, Nokia Lumia, BlackBerry, Sony Xperia / holder / support / stand / phone holder in ball shape / spherical and suction cup brand Incutex ( Electronics) 2
Red Mini mobile bowl stand for eg iPhone 3/4/5 / 5C / 5S, Samsung Galaxy S4 I9500, HTC, Nokia Lumia, BlackBerry, Sony Xperia / holder / support / stand / phone holder in ball shape / spherical and suction cup brand Incutex ( Electronics)
I've tried this stand, and neither the HTC Desire (matt surface) nor the HTC Desire S (smooth metal surface) adhere the suction cup well enough to the phone actually for more than one to be able to stand two minutes.
The illustration shows the stand even with an iPhone with glass back, as it may work - but a normal smooth metal or plastic surface is not enough, in my experience.
The return and refund of the purchase price by "Prince Memory" worked impeccably.