I am a big fan of cargo pants, but they do not look good in an office environment.  I had several pairs of the old Docker's Mobile Pant (the ones with the X-ray advertisements), and they were great.  Now that smart phones are even more popular, I think these are a great way to not have a holster.
Issues:
  The old mobile pants had two side pockets (one on each side).  This was handy for people with glasses or for other stuff (it's bad for your back to sit on your wallet, so a second pocket was handy).
  The old mobile pants had a looser leg fit.  This seems kinda dumb to do a strait leg for pants that are specifically purchased to stash stuff.  If you are in between waist sizes, buy the bigger size for a bigger leg fit.
Positives:
  They hold my cell phone without a utility belt.
  The pocket is along the thigh. This is higher than the old mobile pants and higher than cargo pockets. It works well and makes it easier to use the zipper without two hands.

As I've said, I was a big fan of the old Mobile Pants and used to cruise E-bay for people that had leftover stock.  I have not tried the 5.11 Tactical Covert Khaki, but those have two side pockets and I love my 5.11 tactical hiking pants.  I'll probably give those a try next.