Perhaps you have a program that is unlocking it or preventing it from autolocking, or you set the autolock period for too long, or you got some magnets near your pockets, or perhaps you're one of the few that have already worn off the screen slide springness and has the screen just open up as you walk?


I place mine on my pocket and somtimes in my backpack pocket all the time, and except for this time i forgot i had set the GPS track recording software to light up the screen while moving, i never had any issues with unwanted screen input, usually i don't even check if it is locked or not before pocketing it, i just trust it will be locked when necessary and way more often than not it always proves it deserves my trust.