Can't take 5 steps with this player in my pocket without repeated skips and replays. Impossible to walk with it, just the pressure of my fleece shifting when I move pushes the buttons. I hope FiiO reconsiders adjusting the lockscreens.
After reading about all of the issues with carrying the X5 in pockets I picked up a mobile phone belt clip case to put it in. So far it works great. Granted I can only access the volume buttons depending on how the player is inserted in the case, but it beats skips, etc.
I got the Rocketfish Mobile Leather Hip Case for larger sized phones (model: RF-UL2BL) from Best Buy for $10 on clearance.
It holds 5" phones so it is plenty big for the player, & fits with my IEMs connected.