I use either the "Neoprene Arm Band AB82 *)" from the shop here or the defy-set2 from bikertech.
I push the "On/Off Button on top to start/stop the Dislpay sleep mode.
question for bird_kn: perhaps there is a misunterstanding, I think there are 2 kinds of otterboxes, I would say a soft one you put in the pocket of your jacket or a hard one with hinge and 2 buckles as I use. This I fix with a fasterner called " Klick fix" on the handlebar. When the phone is in this box you can't touch the button on top as you normally do to stop display-sleep-mode. In the box you only can touch the display through a film. How do you start and stop sleep-mode, with witch button or by the display.
I use this combination too without any problems.
I allways switch manualy to sleep-mode and back to.
I don't need to have the whole informations all the time.